SIMOLIO SM-823D Pro User manual

2.4GHz Wireless TV Headsets
User Manual
SM-823D Pro
Sales & Support Email: [e-mail] (for NA/AU)
[e-mail] (for UK)
Sales & Support Email: [e-mail] (for NA/AU)
[e-mail] (for UK)

01
Thank you for choosing the SIMOLIO SM-823D Pro Wireless TV Headset. Please
read this guide carefully and keep it in a safe place for future reference. If you need
any further assistance, please contact our customer support team at:
[e-mail] (NA/AU)
[e-mail] (UK)
Response Time: 2-24h, excl. Holidays
Welcome to subscribe to our YouTube channel - “Simolio Direct” for more
product information.
SM-823D Pro SM-823D Pro
IMPORTANT SAFETY INSTRUCTIONS
1. Please read this instruction manual carefully and completely before using the
products. Keep this manual easily accessible at all times.
2. Always keep the product dry, and do not expose them to extreme temperatures.
3. The receiver must keep the minimum volume before switching the unit on.
High volume may cause hearing damage to persons with normal hearing,
especially to children.
4. Keep devices away from liquid. Before cleaning the product and its accessories,
disconnect the transmitter from the power adapter, and use only a slightly damp
cloth to clean the devices.
5. Use only the supplied power adapter.
6. Use the products with care and set them up on a stable surface of a clean,
dust-free environment.
7. The unit may get hot during use. Ensure the unit has adequate ventilation.
8. Please put the product far away from microwave oven, mobile phones, WiFi
router etc. to avoid unnecessary electronic wave interference.
9. Please switch off the transmitter and receiver after use, and pull out the power
adapter from the wall socket when not using for a long time.
10. Only qualified person can provide services! Do not attempt to open the unit!
Table of Contents
Pacemaker Safety:
Before using this product with a pacemaker or other medical device,
consult your physician or the manufacturer of your pacemaker or other
medical device.
CAUTION!
Important Safety Instruction ................................................. 01
Overview ............................................................................... 02
Features ................................................................................. 02
Product Diagram .................................................................... 04
Package Contents ................................................................... 05
LED Indication ...................................................................... 05
How to Use ............................................................................... 06
1. Check Your TV/Audio Source Output Options before the Set up .. 06
2. Turn on the Transmitter and Headset .................................. 06
2.1 Power the Transmitter ...................................................... 06
2.2 Turn on the Transmitter .................................................... 07
2.3 Turn on the Headset ...................................................... 07
3. Connect the Transmitter to Your TV/Audio Source ................... 07
3.1 Digital Optical Connection ............................................... 07
3.2 RCA Analog Connection ................................................... 09
3.3 3.5mm/AUX Analog Connection ....................................... 10
3.4 Other Connections in Special Cases ................................... 12
4. Use Two Sets of SIMOLIO 2.4GHz Wireless TV Headsets
Simultaneously in the Same House ......................................... 14
5. Charge the Headset .............................................................. 15
6. Customizing your SM-823D Pro ........................................... 15
Troubleshooting ..................................................................... 17
Technical Specifications ....................................................... 20
Limited Warranty .................................................................... 20
...............

OVERVIEW
FEATURES
02 03
Would you like to watch television with crystal-clear sound that won’t disturb
others in your family? Do you want to avoid hearing damage that could be caused
by wearing normal wireless headphones for a long time? SIMOLIO SM-823D Pro
wireless TV hearing assistance and protecting headset is just made for you.
(1) Wireless TV Hearing Assistance and Hearing Protecting Function
Soften the background sound, make the TV conversation stand out, help the
hearing impaired people to understand the TV clearly, solve the problem that
regular hearing aid cannot do. The unique voice highlighting tech and customized
tone adjustment allow people to enjoy TV programs in safe sounds, protecting
people's hearing from the progressive hearing damage caused by watching TV
with normal headphones for a long time.
(2) Personal Sound Amplifier
A MIC button is designed as an additional & unique feature to help you to
temporarily hear what people are talking to you when watching TV without taking
off the headset.
Apply with the latest 2.4GHz Digital Automatic Frequency-Hopping Spread
Spectrum (FHSS) technology, it gives you crystal-clear sound with the freedom
of a wireless connection - up to 100 feet without obstacles. You can customize
your listening at a most comfortable volume level, via balance and tone controls.
Our voice highlighting and noise cancelling technology dynamically reduce TV
background sounds and make TV dialogues stand out. At last you can easily
understand the TV dialogues at a healthy volume without worrying about your
hearing being damaged.
The SIMOLIO SM-823D Pro is especially helpful for hearing-impaired people. It
overcomes the weakness of regular hearing aids, which amplify both speech and
environmental background at the same time. Normal wireless headphones for TV
watching don’t help either, they also amplify everything together. What’s more,
over time you’ll keep turning the volume up and up, and that can make your
hearing worse and worse. Our hearing protecting headset solves these problems.
The unique “one-button push” sound amplifier function allows you to hear
clearly what people are talking nearby without taking off the headsets.
It’s compatible with both digital and analog audio output ports and suitable for
almost all TVs and the set-top boxes on the market.
(3) Long Distance Transmission
Supported with the latest technology, you can have wireless freedom and crystal
clear voice within a range of up to 100 feet.
(4) Voice Highlighting Tech
Reduce background sound in TV to highlight the dialogues, so that words hard to
hear can easily stand out, making television dialogues to be understood easily.
(5) Noise Cancelling Tech (NCT)
Reduce the ambient noise to help the users to focus on listening to the dialogues
in TV.
(6) Automatic Signal Control (ASC)
Our special circuit design can adjust the sudden volume change and make the
output volume stable. It will avoid strong signal hurting the users' hearing.
(7) BALANCE Control
The balance control allows for right/left volume adjustment. Adjust the balance
so that you hear equally well with both ears.
(8) TONE Control
It is specially designed for people who have different sound frequency
sensitiveness. They can select TONE (Treble/Normal/Bass) to find the optimum
parameters, and hear the target audio source clearly.
(9) MONO/STEREO Optional
You can switch to STEREO for enjoying Hi-Fi sound quality music or select
MONO for enjoying more clear TV dialogues.
(10) With Rechargeable & Replaceable Li-battery & Power Charging
Dock Station
One full charge supports approx 5~7 hours continuous working depending on the
average volume level of the headset.
When no signal is received for 10 minutes, the headset will be powered off
automatically.
(12) One Transmitter Can Support Multiple Headsets
Additional SIMOLIO 2.4GHz wireless headset receivers can be added to the
SM-823D Pro system, allowing multiple listeners to enjoy the same audio source.
(11) Headset Designed with Auto Power Off Function for Power Saving
SM-823D Pro SM-823D Pro

LED Indicators of the Headset
Built-in MIC working mode
LED Status Headset Status
Green flashes slowly LED No signal received
Green LED quickly and
headphone beeps every minute
flashes
Green LED lighting steadily Wireless working mode
Low power indication
Red LED lighting steadily
Built-in MIC off
Red LED off
04 05
PRODUCT DIAGRAM
(13) Good Compatibility
Compatible with any brand of TV/Smart TV box/ Cable TV box/Set-top
box/DVD/other audio device that has a Digital Optical, RCA or 3.5mm AUDIO
OUT port(s).
(14) Super-soft Memory Foam Ear tips
The super-soft memory foam ear tips can reduce earphone irritation and fatigue,
but we strongly suggest that you change your ear tips every 30 to 60 days, this will
ensure comfort and cleanliness.
DC 5V
OFF/ON
OFF/MONO/STEREO
VOLUME
ON OFF
BALANCE
2. Receiver
Power &Working
Indicator (Green)
Charging
Indicator (Red)
Charging Slot
Charging Socket
Wireless Receiving
Indicator (Green) Personal Sound
Amplifier
Indicator (Red)
AUDIO IN
TONE
TREBLE/NORMAL/BASS
(Left Right) (Low High)
Battery Cover
(Replaceable Li-battery inside)
Personal Sound
(MIC ON/OFF)
1. Transmitter
Amplifier Button
OPTICAL IN
OPTICA L IN
BASS
TREBLENO RMAL
STEREO
TONE
MONO
OFF
DC 5V
OFF/ON
POWER IN
OPTICA L IN
ON
VOL
BAL
OFF
L
R
L
H
PACKAGE CONTENTS
LED INDICATION
LED Status Transmitter Status
Green LED flashes slowly No signal received within 5 minutes
Bright green LED lighting steadily
Red LED lighting steadily
Red LED off
Dark green LED lighting steadily In standby mode (no audio signal in
for more than 5 minutes)
Wireless working mode
Headset charging
Headset charging completed/no charging
LED Indicators of the Transmitter
User Manual Quick Guide
US
UK
Power Adapter
or
Optical
Fiber Cable
Transmitter
Headset
Ø3.5mm RCA
Audio Cable
-
3.5mm
Audio Cable
Ø
2.4GH z Wirele ss TV Head sets
Use r Manua l
SM- 823 DPr o
Sale s & Suppo rt Emai l: supp ort@si molio .com (f or USA)
supp ort_uk @simo lio.c om (for U K)
SM-823D Pro SM-823D Pro

Note:
• The transmitter will automatically enter standby mode within 5 minutes of no
signal input, and it will automatically restart when there is an audio signal input.
HOW TO USE
SM-823D Pro is compatible with OPTICAL output, RCA (labeled “AUDIO OUT”)
and AUX 3.5mm output.
1. Check Your TV/Audio Source Output Options before the Set up
Other RCA
jacks(usually
audio in)
• The headphone will power off automatically after 10 minutes of no audio signal
in. Using it again, you need to slide ON/OFF switch to “OFF” position, then slide
to “ON”. Be aware, the headphone will not automatically power off in the personal
sound amplifier mode unless the battery is dead.
AUDIO IN
Digital Optical
AUDIO OUT
OPTICAL
AUDIO OUT
(need extra 6.35mm
to 3.5mm adapter,
purchase separately)
(need extra digital to
analog converter,
purchase separately)
Digital
AUDIO OUT
Coaxial
COAXIAL
Jack
Options
Natively
supported?
Please refer
to Point
6.35mm
Phone jack
PHONE
3.1
AUX/3.5mm
3.3
RCA jacks
labled
AUDIO OUT
R
L
AUDIO OUT
3.2 N/A 3.4 3.4
Fig 1-1
07
06
2. Turn on the Transmitter and Headset
Note:
• Three different audio cables included: digital optical cable, RCA cable and
3.5mm cable. In the end, only one of these cables is needed to complete the
installation.
• If your audio source device has an optical audio out port, please connect
SIMOLIO to this port preferentially. If not, you can also connect SIMOLIO to the
RCA or AUX/3.5mm or other audio out port of the audio source device.
SM-823D Pro SM-823D Pro
2.1 Power the Transmitter (Ref. Fig 2-1)
Plug the supplied AC adapter into a standard electrical outlet, plug the other end
of the AC adapter into the port labeled “DC 5V” on the back of the transmitter.
3.1 Digital Optical Connection
This part will instruct you on how to connect the SM-823D transmitter to your
television, satellite, or cable box using an optical digital audio cable.
Pro
• If you cannot get to the back of your TV and you only watch the programs
through a fixed TV box (cable/satellite box/DVD etc.), you can also use these
instructions to install the system to your TV box.
2.2 Turn on the Transmitter (Ref. Fig 2-2)
Slide OFF/MONO/STEREO switch to “MONO” or “STEREO” position.
2.3 Turn on the Headset
Slide ON/OFF switch to “ON” position .
(Ref. Fig 2-3).
ON OFF
Fig 2-2
Fig 2-3
ON
VOL
BAL
OFF
L
R
L
H
Note: Please charge the headset for 3 hours before using it for the first time.
3.Connect the Transmitter to Your TV/Audio Source
DC 5V OPTICAL IN
BASS
TREBLE NORMAL
STEREO
TONE
MONO
OFF
OFF/ON
POWER IN
OPTICAL IN
Power in
Power adapter
Transmitter
DC 5V
POWER IN
Set the audio output of your audio sources to a sufficient level to ensure the normal
hearing level people can hear TV clearly.
i.e. set the TV box VOL ≥ 30 % & TV VOL ≥ 40% (Ref. Fig 3-1) (Ref. Fig 3-2)
For watching TV quietly without disturbing others, the right way is: Mute your TV by
pressing the MUTE button on the remote control or choose any speaker option other
than TV Speaker in the TV Sound Output settings.(Ref. Fig 3-3)
• The above settings may differ from various TVs.
Mute
Fig 3-3
TV VOL ≥40 %
Fig 3-2
TV box VOL ≥ 30 %
Fig 3-1
Fig 2-1
STEREO
MONO
OFF
OFF/ON

Plug either end of the optical audio cable into the “Digital Audio Out (Optical)”
port on the back of the TV. Plug the other end of the optical digital audio cable
into the port on the back of the transmitter labeled “OPTICAL IN”.
Step 2. TV Audio Format and Speaker Setting (use TV remote control)
If you can not hear sound from your headsets after connecting:
CAP
Optical Audio Cable
Digital Audio Out
(Optical)
Step 1. Hook up SIMOLIO to the Optical Audio Out Port of the TV/other
Audio Device
Remove the protective plastic caps
from both ends of the optical digital
audio cable.
• Be aware that the base should be placed at least 4 feet away from your Router/
smart WiFi TV/TV sticks/WiFi TV box to avoid interference.
Fig 3-4
Fig 3-5
• Ensure TV Audio Format is set to “PCM” or “Dolby/DTS” is OFF (This is
IMPORTANT, Ref. Fig 3-6)
PS: for certain smart Samsung models, the TV is retaining separate settings for
regular TV and internet TV setup. When you turn to the Smart Hub for Internet
source, please use the TV remote to go to Settings > Sound > Expert Settings >
Audio Format or Digital Output Audio Format, then select PCM.
DC 5V OPTICAL IN
BASS
TREBLE NORMAL
STEREO
TONE
MONO
OFF
OFF/ON
POWER IN
OPTICAL IN
OPTICAL IN
OPTICAL IN
09
08
3.2 RCA Analog Connection
This Part is an alternative to 3.1 on page 8. This part will explain how to connect
the SIMOLIO SM-823D Pro transmitter to your television, satellite, or cable box
using an RCA analog audio cable.
Notes: If your TV only support single sound out, the TV’s speakers will be either
automatically muted when you plug something into an audio out port (Optical/
AUX/RCA, etc.) or they become disabled once you choose "External Speakers"
as your TV's audio output. It depends on TV circuit design.
Plug the red and white ends of the audio cable into the analog RCA Audio Out
ports (red and white ports labeled “AUDIO OUT”) on the back of the TV. Plug
the single end of the audio cable into the port labeled “AUDIO IN” on the back of
the transmitter.
• Ensure your TV speaker is set to “External Speakers”. (Ref. Fig 3-7)
Fig 3-6 Fig 3-7
* Setting menu may be different depending on different TV brands and models.
For most TVs, the TV's internal speakers and an external audio device can work
simultaneously. Such as, for some newer LG TVs, when do optical audio
connection, you can set the “Sound Out” to “Internal TV Speaker + Audio Out
(optical)”. And for some newer Samsung TVs, you can enable this feature by
selecting “TV Speaker” from the TV Sound Output lists.
• Be aware that the base should be placed at least 4 feet away from your Router/
smart WiFi TV/TV sticks/WiFi TV box to avoid interference.
• If you cannot get to the back of your TV and you only watch the programs
through a fixed TV box (cable/satellite box/DVD etc.), you can also use these
instructions to install the system to your TV box.
Step 1. Hook up SIMOLIO to the RCA Audio Out Port of the TV/other Audio
Device
Speakers
Internal speakers
External speakers
Headset
Settings
Audio Format
Dolby Digital
DTS
DTS Neo 2:5
PCM
Fig 3-8
RCA Audio Cable
TV REAR
R AUDIO OUT L
DC 5V OPTICAL IN
BASS
TREBLE NORMAL
STEREO
TONE
MONO
OFF
OFF/ON
POWER IN
OPTICAL IN
AUDIO IN
SM-823D Pro SM-823D Pro

11
Step 2. TV Audio Out Checking and TV Speaker Setting (use TV remote
control)
If you can not hear sound from your headsets after connecting:
AUDIO OUT
R
L
COMPONENT IN
VIDEO IN
TV REAR
Notes:
* If your TV only support single sound out, the TV’s speakers will be either
automatically muted when you plug something into an audio out port (Optical/
AUX/RCA, etc.) or they become disabled once you choose "External Speakers"
as your TV's audio output. It depends on TV circuit design.
• Ensure use TV Red/White ports labeled “AUDIO OUT” or “OUTPUT”, other
Red/White ports are incorrect. (Ref. Fig 3-9)
• Ensure your TV speaker is set to “External Speakers”. (Ref. Fig 3-10)
For most TVs, the TV's internal speakers and an external audio device can work
simultaneously. Such as, for some newer LG TVs, when do analog RCA audio
connection, you can set the “Sound Out” to “Internal TV Speaker + Headphones”.
And for some newer Samsung TVs, you can enable this feature by selecting “TV
Speaker” from the TV Sound Output lists.
Speakers
Internal speakers
External speakers
Headset
SETTINGS
ANALOG AUDIO OUT
FIXED
SOUND / AUDIO
Fig 3-9 Fig 3-10 Fig 3-11
VARIABLE
10
Contact your TV manufacturer for assistance. (Ref. Fig 3-11)
3.3 3.5mm/AUX Analog Connection
This part is an alternative to 3.1 and 3.2 on page 8-10. This part will explain how
to connect the SIMOLIO SM-823D Pro transmitter to your television, satellite, or
cable box using a 3.5mm/AUX analog audio cable.
AUX/3.5mm Audio Cable
H/P or Audio Out
Fig 3-12
Plug one end of the 3.5mm audio cable into the “Audio Out” port on the back of
the TV. Plug the other end of the audio cable into the port labeled “AUDIO IN” on
the back of the transmitter.
• If you cannot get to the back of your TV and you only watch the programs
through a fixed TV box (cable/satellite box/DVD etc.), you can also use these
instructions to install the system to your TV box.
• If you connect the 3.5mm audio cable to the 3.5mm Audio Out port which is
usually a Headphone port on your TV, your SIMOLIO SM-823D Pro will still
function properly, but the sound to your TV internal speakers will be muted. The
port is usually labeled with an headphone icon.
• Be aware that the base should be placed at least 4 feet away from your
Router/smart WiFi TV/TV sticks/WiFi TV box to avoid interference.
*Setting menu may be different depending on different TV brands and models.
Step 1. Hook up SIMOLIO to the 3.5mm Audio Out Port of the TV/other
Audio Device
* Your TV’s analog audio settings may be set to “Variable” or “Fixed”. If you
want to be able to control your TV volume level separate from your SIMOLIO
SM-823D Pro volume level, you will need to make sure your TV is set to “Fixed”.
DC 5V OPTICAL IN
BASS
TREBLE NORMAL
STEREO
TONE
MONO
OFF
OFF/ON
POWER IN
OPTICAL IN
AUDIO IN
Step 2. TV Audio Out / TV Speaker Setting (use TV remote control)
If you can not hear sound from your headsets after connecting:
• Plug a wired headphone/earphone into the 3.5mm audio out port of the TV to test
if you can hear the TV sound. (Ref. Fig 3-14)
• Ensure your TV speaker is set to “Headset”. (Ref. Fig 3-13)
Fig 3-13 Fig 3-14
H/P or Audio Out
Speakers
Internal speakers
External speakers
Headset
a wired headphone/
earphone
94dB 85dB 75dB
volume
L
SM-823D Pro SM-823D Pro

Optical splitter
Optical Fiber
Cable
Sound Bar
Optical Fiber
Cable
SM-823D Pro
(Transmitter)
Fig 3-20
Digital Audio Out
(Optical)
13
Notes:
* Your TV’s audio settings may be set to “Variable”
or “Fixed”. We recommend that you set your audio
settings to “Fixed” for better audio quality when
using this installation option. If you want to be able
to control your TV volume level separate from your
SIMOLIO SM-823D Pro volume level, you will need
to make sure your TV is set to “Fixed”. Contact your
TV manufacturer for assistance.
wireless
transmitter
Coaxial
Digital Out
AUDIO IN
Digital to Analog Converter
RCA OUT
L
R
COAXIAL IN
Step 2. TV Audio Format and Speaker Setting (use TV remote control)
If you can not hear sound from your headphones after connecting:
1) TV/Audio Source only has Digital Coaxial Audio Out port
3.4 Other Connections in Special Cases
* Setting menu may be different depending on different TV brands and models.
Fig 3-16
Step 1. Purchase a Digital to Analog Converter and Set up as Shown in
Fig 3-16
If your TV/Audio Source only has a digital coaxial audio out port, you will need a
digital to analog converter (DAC) for installation.
Fig 3-15
SETTINGS
ANALOG AUDIO OUT
VARIABLE
FIXED
SOUND / AUDIO
DC 5V OPTICAL IN
BASS
TREBLE NORMAL
STEREO
TONE
MONO
OFF
OFF/ON
POWER IN
OPTICAL IN
Note: Setting menu may be different depending on different TV brands and models.
RCA
OUT
L
R
COAXIAL IN
Connect TV/
Cable box/
STB etc.
RCA Audio Cable
COAXIAL IN
Connect TV/
Cable box/
STB etc.
Fig 3-17 Fig 3-18
Fig 3-19
• Ensure TV Audio Format is set to “PCM” or “Dolby/DTS” is OFF (This is
IMPORTANT, Ref. Fig 3-17)
PS: for certain smart Samsung models, the TV is retaining separate settings for
regular TV and internet TV setup. When you turn to the Smart Hub for Internet
source, please use the TV remote to go to Settings > Sound > Expert Settings >
Audio Format or Digital Output Audio Format, then select PCM.
• Ensure your TV speaker is set to “External Speakers”. (Ref. Fig 3-18)
• Take turns to test RCA connection and 3.5mm /AUX connection.
Speakers
Internal speakers
External speakers
Headset
Settings
Audio Format
Dolby Digital
DTS
DTS Neo 2:5
PCM
H/P
L
R
a wired headphone/
earphone
a wired headphone/
earphone
L
94dB 85dB 75dB
volume
or
2) If your TV/Audio Source’s Digital Optical Audio Out port is occupied
by soundbar, you will need an optical splitter for installation.
Step 1. Purchase an Optical Splitter and Set up as Shown in Fig 3-20
Step 2. If you can not hear sound from your headsets after connecting, follow
the part of 3.1 on page 8-9 to check your settings.
3) Use SIMOLIO SM-823D Pro to your AV Receiver with 6.35mm PHONE
jack
• Use a wired headphone/earphone to plug into the H/P port or RCA
output of the DAC to test if you can hear the TV sound. (Ref. Fig 3-19)
L
94dB 85dB 75dB
volume
12
SM-823D Pro SM-823D Pro

•
then turn on the transmitter and headset
and make sure the green LED indicators
are facing towards each other for about 5
seconds.
Take the headset close to the transmitter,
Note: If two headsets are used on the
same TV, only one transmitter needs to
be connected, because one transmitter
supports multiple headsets to work
simultaneously.
Fig 4-1
1) Connect the original power adapter with the transmitter
and an electrical outlet, slide the OFF/MONO/STEREO
switch to MONO or STEREO to power on the transmitter.
5.Charge the Headset
2) Slide the ON/OFF switch of the headset to “OFF”. Put
the headset into the charging slot of the transmitter
vertically and carefully and be sure the front of the
headset with the logo of “SIMOLIO” is facing towards
the front of the transmitter with the logo of “SIMOLIO”.
The red charging indicator on the transmitter lights up
and the headset starts charging. If not, please check and
make sure the charging pins are fully inserted.
Notes: The charging time is approx. 3 hours. The headset will last approx 5~7
hours on a full charge, but will last a lesser or greater amount of time depending on
the average volume level of the headset.
14 15
• Use the 6.35 to 3.5mm converter to plug a wired headphone/earphone into the
port on AV receiver to check whether the sound is normal.
Step 2. Check the Performance of the AV Receiver's Audio Output as Shown
in Fig 3-19
Pho nes
AV Receiver
6.35mm Audio adapter
(purchase separately)
3.5mm Audio Cable
6.35mm Phone jack
Fig 3-21
Fig 3-22
AV Receiver
6.35mm Audio adapter
(purchase separately)
3.5mm Audio Cable
6.35mm Phone jack
Step 1. Purchase a 6.35mm to 3.5mm Adapter and Set up as Shown in Fig 3-18
SM-823D Pro is not compatible with ANY RCA(L/R) ports on your AV Receiver,
ONLY use the BIG 6.35mm PHONE OUT on front side of your AV Receiver
with the 6.35mm to 3.5mm adapter (purchase separately).
If you can not hear sound from your headsets after connecting:
Phone s
AUDIO IN
DC 5V OPTICAL IN
BASS
TREBLE NORMAL
STEREO
TONE
MONO
OFF
OFF/ON
POWER IN
OPTICAL IN
94dB 85dB 75dB
volume
L
Fig 4-2
Wireless Receiving
Indicator (Green)
( )headset
(Transmitter)
Power &Working
Indicator (Green)
• The two sets of SIMOLIO SM-823D Pro should be put at least 10 meters away from
each other when using them simultaneously.
4.Use Two Sets of SIMOLIO 2.4GHz Wireless TV Headsets
Simultaneously in the Same House
room 1 room 2
SM-823D Pro
(Transmitter 2)
SM-823D Pro
(Transmitter 1)
Distance >10M (at least)
Plug in
to
charge
Fig 5-1
6.Customizing your SM-823D Pro
1) Please make sure the headsets are being worn properly. Each side of the
headset has a letter to guide the wearer: “L” for left and “R” for right. The headset
arms incorporate memory stainless steel strips which can be adjusted to a more
comfortable wearing shape.
Fig 6-1
•
evenly bend inwards to adjust the arms
into a more comfortable shape.
• Repeat this process as necessary.
Hold each side of the headset arms and
SM-823D Pro SM-823D Pro

Fig 6-2
Hanger loops
3)Balance Control: If the hearing abilities of two ears are not the same, you can
rotate the BAL dial on the headset for right/left volume adjustment so that you
hear equally well with both ears.
4) Tone Control: Select the TONE (TREBLE/NORMAL/BASS) at the rear of
transmitter to find the best feature, make sure you can hear the TV voice clearly.
BAL
L
R
ON
VOL
BAL
OFF
L
R
L
H
DC 5V OPTICAL IN
BASS
TREBLE NORMAL
STEREO
TONE
MONO
OFF
OFF/ON
POWER IN
OPTICAL IN
BASS
TREBLE NORMAL
TONE
Fig 6-3
Fig 6-4
1716
6) Personal Sound Amplifier Function: while listening wirelessly, press the
MIC ON/OFF button at the rear of the headset, the personal sound amplifier
indicator will be solid red, you can clearly hear what people’s talking to you
nearby. Press the MIC button again or switch off the headset and then on, it will
be back to wireless listening, the personal sound amplifier indicator will be off,
and the working indicator will be solid green. But if you press the MIC ON/OFF
button by chance when listening wirelessly, the volume will be low with the
ambient noise will be occurred.
ON
VOL
BAL
OFF
L
R
L
H
Fig 6-7
7) Ear tips Replacement as shown in Fig 6-7
5) Mono/Stereo Option: You can switch to STEREO for enjoying Hi-Fi sound
quality music or select MONO for enjoying more clear TV dialogues. If, despite a
correct balance adjustment, you can hear the sound only with one ear: Set the
STEREO/MONO switch on the transmitter to MONO.
DC 5V OPTICAL IN
BASS
TREBLE NORMAL
STEREO
TONE
MONO
OFF
OFF/ON
POWER IN
OPTICAL IN
TREBLE
STEREO
MONO
OFF
OFF/ON
Fig 6-5
Fig 6-6
2) Hanger Loops Installation (if necessary)
You can attach the hanger loops (purchase separately) to the headset to help you
better adapt to the weight of the under-chin headset. (Ref. Fig 6-2)
• Hook the decompression hanger loops on each side of the headset.
• Put the hanger loops on the ears, rotate them to best fit yourself.
TROUBLESHOOTING
Phenomena Causes Solutions
The transmitter is not connected well.
Make sure the AC adapter and the
audio cable of the transmitter are
plugged in place.
Switch to MONO or STEREO to power
the transmitter on.
The transmitter is not powered on.
The connection between the transmitter
and the audio source is wrong.
Make sure the connection is correct and
in place between the transmitter and the
audio source.
The analog audio cable is plugged into
the AUDIO IN jack of the transmitter
when connecting with the optical cable.
Unplug the analog audio cable from
the transmitter.
Part 1
Headset
doesn’t
work, or
no voice
received
SM-823D Pro SM-823D Pro

19
TROUBLESHOOTING
Sound cuts
in and out
or
some noise
is occurred
The battery isn’t inserted properly into
the battery chamber or the battery is run
out.
Insert the battery properly, or charge the
battery fully.
The is out of the transmitting
range.
headset Move the headset closer to the transmitter.
The headset is working on “personal
sound amplifier” status with red
LED on.
Press the MIC ON/OFF button again or
turn the headset off then restart to return
to the wireless TV listening status.
The battery’s power is too low. Charge the battery fully.
The transmitter is placed too close to
metalworks or other electromagnetic
wave objects.
Put the transmitter far away from the
interference sources.
The headset is powered off
automatically. Switch the off, then on. headset
The audio out port of the connected
audio device is defective
(no sig al out ).n
Connect to another audio out port .
TV volume is turned down to ZERO.
Adjust the TV volume to a sufficient
level. If you want to mute the TV, please
click the MUTE key on the TV remote
control or go to TV settings to OFF the
Internal TV speaker.
The audio source’s volume is set too
low. Adjust its volume properly.
Phenomena Causes Solutions
Headset
doesn’t
work, or
no voice
received
The audio sources (TV and TV related
AV devices) are not turned on or their
volume are set too low.
Turn on the audio source, and adjust its
volume to a sufficient level.
TV audio output is disabled or not
activated.
Follow the instructions in your TV user
manual to change the TV’s AUDIO OUT
setting to"External TV Speakers".
Set it to PCM. For example: Settings >
Sound > Digital Audio Out Format>
Dolby/DTS/PCM, menu depends on TVs.
The audio out format of TV and TV
related AV devices (e.g., Cable box,
STB, DirecTV, etc.) is not set to PCM.
18
Part 3
If you are using RCA connection,
the two ends of the RCA audio cable
are not fully inserted into the RCA
audio out port of the TV/other audio
source.
Try waggling the RCA audio cable or
re-inserting the RCA audio cable.
Faulty cable/audio out port issue Try another audio cable or another audio
device.
Sound cuts
in and out
or
some noise
is occurred
The audio out function of the
connected audio device is defective
(poor signal out).
The connection between the
transmitter and the audio source is not
in place.
Make sure the connection is firm between
the transmitter and the audio source.
Connect to another audio out port .
Place the transmitter base at least 4 feet
away from smart WiFi TV/WiFi TV box/
TV sticks to avoid interference.
The headset is used for listening to
streaming media (Netflix, Amazon
Prime Video etc.)
Adjust the balance control properly.
Switch the transmitter to MONO.
The balance is not adjusted properly.
The audio out signal of audio source
is mono, but the transmitter is
switched to STEREO.
The voice is
heard only
with one ear
Phenomena Causes Solutions
Part 2
SM-823D Pro SM-823D Pro
Headset
can not be
charged
successfully
Faulty USB adapter.
Please unplug the faulty USB adapter
and change another power source like
PC USB port, socket, different USB
charger (5V/500mA-2A).
The transmitter is not switched on.
The headset is not put into the
charging slot properly or firmly.
The battery is not inserted into
the battery compartment in the
correct way resulting in the
battery contacts distorted.
Switch on the transmitter.
Replace with a new headset.(damage
due to misuse, not covered by warranty)
Make sure the headset is put into the
charging slot correctly and firmly, the
front of the headset with the logo of
“SIMOLIO” is facing towards the front
of the transmitter with the logo of
“SIMOLIO”.

20
SM-823D Pro
LIMITED WARRANTY
12 months limited warranty: The 12 months warranty will cover defects in
manufacturing and product failure for a period of 12 months from the original
date of purchase. The warranty period is not extended if we repair or replace a
warranted product.
This warranty is provided at the discretion of Simolio Ltd. And does not cover
cosmetic damage or damage due to acts of nature, accident, misuse, abuse,
negligence, commercial use, or modification of or to any part of the product.
Accessories such as audio cables, power adapter and perishable items such as
ear tips and batteries are not covered under this warranty.
Please contact Simolio customer support team and provide your Amazon order
ID to register the warranty.
[e-mail] (for NA/AU)
[e-mail] (for UK)
TECHINICAL SPECIFICATIONS
Signal-to-noise ratio
Transmission mode Automatic Frequency-Hopping Spread Spectrum
Carrier frequency 2.4GHz ISM BAND
Power Supply
output: DC 5V, 1A input : 100~240V
built-in 350mAh Li-ion Battery
Transmitter
Headset
Frequency response
Distortion ≤1%
20 Hz – 20 KHz
≥70dB
Range Up to 100 feet (without obstacles)
Working time approx 5~7 hours under wireless hearing mode
Charging time 3 hours
plug of power cable : 4.0*1.7mm