Tecson Hotec H-U05 User manual

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Hotec UHF Wireless Headset/Lavalier Microphone System
USER MANUAL
Model: H-U05/H-U25
Thanks for purchasing Hotec Wireless Headset/Lavalier Microphone System, please read the
following instructions carefully before use.
Email: suppor[email protected]
Website: www.sz-tecson.com
Facebook page: https://www.facebook.com/Hotechome/
Or scan the QR code
Hotec® is the registered trademark of Shenzhen Tecson Trade and Technology Co., Ltd.
H-U25 H-U05

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Product Introduction
Hotec UHF Wireless Lapel/Lavalier and Headset Microphone system is designed for amplifying
voice through speakers, karaoke machines, amplifiers, mixers for DJ, church, wedding,
lecturers where hands free are needed, or for recording on phones, cameras, tablets,
computers or live performances.
Both the mini receiver and the bodypack transmitters are powered by rechargeable batteries.
Made of aluminum zinc, the product is light weight, sturdy and small.
① Battery low indicator: battery is low if this indicator becomes Red, charge the Mini
Receiver when the battery is low. When it is fully charged or has sufficient power, the
battery low indicator is Blue.
② Power button: Short press this button to turn on/off the product.
③ USB charging port: Charge the Mini Receiver using the micro USB cable, input is 5V1A.
④ AF/RF indicator: For H-U05, when the Mini Receiver and the Bodypack Transmitter is
connected, it is Blue; when there is audio signal input, Green light flashes. For H-U25, when
Mini Receiver
H-U05
Mini receiver x 1
Transmitter x 1
Lapel/lavalier microphone x 1
Headset microphone x 1
USB charging cable x 1
TS to TRRS cable x 1
TS to TRS cable x 1
H-U25
Mini receiver x 1
Transmitter x 2
Lapel/lavalier microphone x 2
Headset microphone x 2
USB charging cable x 2
TS to TRRS cable x 1
TS to TRS cable x 1

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channel A is connected, it is Green; when Channel B is connected, it is Blue; when both
channel A and channel B are connected, it is green-blue.
⑤ Charging Status indicator: This will be Red during charging. When the battery is fully
charged, it turns into Green. Unplug the charger when the battery is fully charged.
Battery low
indictor
Red Battery is low
Blue Charged, you have sufficient power
Charging status
indicator
Red In charging
OFF Fully charged
AF/RF indicator
H-U05 Flashes
Green Mic and receiver are paired
H-U25
Green Only CHA is connected with receiver
Blue Only CHB is connected with receiver
Green/Blue Both CHA and CHB are connected with receiver
1. Power button: Short press the Power button to turn on/off the Bodypack Transmitter;
2. Choose the right microphone (included are wireless headset mic / lavalier mic / short mic)
and screw it into the mic input in the Bodypack Transmitter.
3. Left button / right button: Press the left button for volume down and right button for volume
up; Press both left and right button together to change frequency;
4. Charging: There is battery remaining power indicator in the LED screen. Charge the
Bodypack Transmitter with micro USB cable when the battery is low. The charging indicator
below the USB port is Red during charging, it turns into Green when it is fully charged.
Left button Right button Mic Power
button Antenna
Charging
Bodypack Transmitter

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Unplug the charger after the battery is fully charged.
Preparation before use
1. Charge the mini receiver and transmitter(s). Charging time is about 2 hours.
2. Choose the right microphone and screw it into the mic hole of the transmitter. Make sure it
is plugged in tightly.
3. Make sure the receiver and bodypack transmitter is connected. You can tell by the AF/RF
indicator color. For H-U05, when you speak into the microphone, the AF/RF indicator flashes
Green. For H-U25, when only CHA is connected with receiver, the AF/RF indicator is solid
Green; when only CHB is connected, it is soild Blue. When both CHA and CHB are connected,
it is Green/Blue. If you do not see the correct indicator colors, please go to trouble shooting
in the last page for solution or contact the Hotec customer service.
CONNECTION DIAGRAM
1. For audio device that has 1/4” mic jack
Step 1: Plug the mini receiver into the mic jack of the mic input of your audio device like
speaker, mixer, amplifier. Make sure your audio device has mic input and mic volume
control. You can also change the mic volume from the bodypack transmitter by pressing the
volume up or volume down buttons.
Step 2: Turn the microphone volume to minimum before plug in the mini receiver to avoid
feedback or harsh loopback.
Step 3: Power on the transmitter and receiver. When you see the RF indicator at the right
color, you are ready to use.
2. Connect with iOS or Android smartphones
Step 1: Connect the TS to TRRS cable to the mini receiver;
Step 2: Connect the TS to TRRS cable to the headphone jack of you phone.
Step 3: Power on the transmitter and receiver. When you see the RF indicator at the right
color, you are ready to use.
See Figure 1.
Note 1: if you are using iPhone 7 or newer version without 3.5mm headphone jack, you will
need to use the original lightning to 3.5mm adapter (NOT included in the box). See Figure
2.
Figure 1
Figure 2

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Note 2: If you would like to sing karaoke on phone or monitor the recording, connect the
headphone splitter (NOT included in the box) with your phone. Plug the TS to TRRS cable to
the mic jack of the headphone splitter and the headphone into the headphone jack. See
Figure 3.
3. Connect to camera with mic input (See Figure 4)
Step 1: Please make sure your camera has mic input.
Step 2: Connect the TS to TRS adapter to the mini receiver.
Step 3: Connect the TS to TRS adapter to the mic input of the camera.
Step 4: Turn on the mini receiver and bodypack transmitter. You are ready to use when you
see the correct RF/AF indicator color.
4. Connect with computer
Step 1: If the notebook or desktop computer has mic and headphone jacks, use the TS to
TRS adapter. Connect the TS to TRS adapter to the mini receiver. See Figure 5.
Step 2: If the notebook or desktop computer has mic and headphone combo jack, use the
TS to TRRS cable. See Figure 6.
Step 3: Power on the transmitter and receiver. When you see the RF indicator at the right
color, you are ready to use.
Figure 4
Figure 3
Figure 4

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Note:
The computer recognizes the microphone automatically after the receiver is connected
correctly as shown above. If not, go to Control Panel/Sound/Recording, click the external
microphone and go to Configuration. If you need any assistance in setting up, please contact
Hotec customer service.
Product Specification
SYSTEM SPECIFICATIONS
Modulation mode
Digital Frequency Modulate
Frequency Range
UHF 500
-
980MHz
Preset Frequencies
25 (auto pairing)
Frequency Response
75Hz ~ 18kHz +/
-
3dB
Max.
Deviation Range
+/
-
50kHz (with level limiting)
T.H.D
<1.0% @1kHz
S/N
>98dB
Working Range
Up to 100 feet
RF Carrier Stability
+/
-
0.005% (14
℉
-
122
℉
)
Figure 5
Figure 6

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MINI RECEIVER
Product D
imension
1.66
* 1.22 * 0.78 inch
Power
S
upply
Built
-
in rechargeable battery
Power C
onsumption
80mA
Working Hour
For H
-
U05, u
p to 6 hours after fully charged
For H
-
U25, up to 4 hours after fully charged
Power Capacity
6
50mAh
Charging Time
About 2
hour (5V/1A)
TRANSMITTER
Product
Dimension
Carrier Frequency Power
30mW
Power Consumption
80
m
Working Hour
For H
-
U05, up to 6 hours after fully charged
For H
-
U25, up to 4 hours after fully charged
Power Capacity
6
50mAh
Char
g
ing Time
About 2 hour (5V/1A)
Trouble Shooting
Common issues
Possible Cause
Solutions
The transmitter
does not sync with
the receiver.
The transmitter and
receiver were paired in
the factory. If the
product is not in use for
some time, they may
lost pairing.
Pair the receiver and transmitters again. Here is how.
1.Power off the receiver and power on the transmitter;
2.Hold and press the power button, volume up and volume down buttons
(3 buttons together) until the LCD screen starts to flash.
3.Turn on the receiver. You will see the AF/RF indicator blinks briefly.
4.Turn off the transmitter and turn it back on. The receiver and
transmitter are paired.
5.Press both volume up and volume down buttons to change freuquency.
After each pair, the frequency goes back to the default frequency.
The signal cuts in
and out
Some other UHF
devices are working at
the same frequency
Press the
volume up and volume down buttons to select a different
frequency to avoid interference. If you have more than one Hotec UHF
microphones or some other brand UHF devices, please make sure other
sets are powered off or to change the frequency of the one you are using
to avoid interferences.
The lapel mic has
to be very close to
my mouth in order
to pick up my
voice
The transmitter volume
might be too low
Suggested to increase the transmitter volume and the speaker/amplifier
volume and point the lapel mic to your mouth. The default transmitter
volume before leaving factory is about 3, very low.
There is always
harsh sound or
loopback.
We would suggest to
turn the mic volume to minimum before plug in the
receiver, then increase the volume gradually. Don’t be too close to the
audio device. This will help to reduce the harsh sound or loopback.
Can I sync the
mic for H-U25
with the receiver
of H-U05 since
my receiver for
H-25 is broken?
No. Please contact the seller for replacement if the product is
within warranty.
Can I use two
sets together? Is
there any
interference with
each other?
Yes, you can use two sets working together. Make sure the mics
working at different frequency to avoid interference.

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Common issues
Possible Cause
Solutions
My product does
not work with
iPhone
This product works with iPhone perfectly. First, please make sure
the product actually pairs with each other; then check the
connections and make sure every part is connected tightly. Try to
plug and unplug a few times if possible. If you are using it with a
third party Apps, please check if there is any need to select the
external microphone. Contact Hotec customer services if you need
any assistance.
I cannot hear my
voice when I sing
Karaoke on my
phone or
computer.
If you would like to monitor your voice when you record the audio
or sing karaoke, you need to buy an additional headphone splitter
(NOT included in the box). Plug the TS to TRS adapter into the mic
jack of the headphone splitter and headset into the headphone
jack of the headphone splitter.
I cannot hear my
voice when I am
doing recording.
Attention:
1. This product has 32/64 frequency points, when there is any interference, try to find a
different clean frequency to avoid interference.
2. In order to have better stability of the product, please DO NOT bend the antenna both in the
Mini Receiver and the Bodypack Transmitter.
3. Please do not disassemble the product unless you get professional instructions from the
manufacturer.
4. We do not recommend to use this product on small portable Bluetooth speakers.
Manufactured by Shenzhen Tecson Trade & Technology Co., Ltd. Customer service e-mail:
suppor[email protected]