Sennheiser HD 4.50BTNC User manual

HD 4.50BTNC
HD 4.50R
SCBT7
Instruction manual
Wireless headphones

HD 4.50BTNC/HD 4.50R | 1
Contents
Contents
Important safety instructions ...................................................................................2
The HD 4.50BTNC/HD 4.50R Wireless headphones ................................................4
Package includes..........................................................................................................6
Product overview.........................................................................................................7
Overview of the headphones .................................................................................... 7
Overview of pictograms............................................................................................. 7
Overview of the LED indications............................................................................... 9
Overview of buttons .................................................................................................10
Getting started ......................................................................................................... 12
Charging basics..........................................................................................................12
Pairing the headphones...........................................................................................14
Adjusting the headband..........................................................................................18
Using the headphones............................................................................................. 19
Switching the headphones on ................................................................................19
Switching the headphones off................................................................................19
Adjusting the volume...............................................................................................20
Using NoiseGard .......................................................................................................21
Playing music ............................................................................................................ 22
Controlling music playback......................................................................................23
Making calls on the headphones ........................................................................... 24
Voice control function...............................................................................................26
Using the audio cable .............................................................................................. 27
Care and maintenance ............................................................................................. 28
Replacing the ear pads.............................................................................................28
Storage and handling...............................................................................................29
Replacing/removing the rechargeable battery...................................................30
Troubleshooting........................................................................................................ 31
Leaving the Bluetooth transmission range..........................................................32
Clearing previously paired devices.........................................................................32
Specifications ............................................................................................................ 33
Trademarks................................................................................................................ 34

2 | HD 4.50BTNC/HD 4.50R
Important safety instructions
Important safety instructions
XRead this instruction manual carefully and completely before using the
product.
XAlways include this instruction manual when passing the product on to third
parties.
XDo not use an obviously defective product.
XOnlyuse theproduct inenvironments whereBluetooth® wireless transmission
is permitted.
Preventing damage to health and accidents
XProtect your hearing from high volume levels. Permanent hearing
damage may occur when headphones are used at high volume
levels for long periods of time. Sennheiser headphones sound exceptionally
good at low and medium volume levels.
XKeep the headphones at least 10 cm/3.94" from cardiac pacemakers or
implanted defibrillators. The headphones contain magnets that generate a
magnetic field which could cause interference with cardiac pacemakers and
implanted defibrillators.
XKeep the product, accessories and packaging parts out of reach of children
and pets to prevent accidents and choking hazards.
XDo not use the product in situations which require special attention (e.g. in
traffic or when performing skilled jobs).
Preventing damage to the product and malfunctions
XAlways keep the product dry and do not expose it to extreme temperatures
to avoid corrosion or deformation. The normal operating temperature is from
10 to 40°C/50 to 104°F.
XOnly use attachments/accessories/spare parts supplied or recommended by
Sennheiser.
XClean the product only with a soft, dry cloth.
XUse the product with care and store it in a clean, dust-free environment.

HD 4.50BTNC/HD 4.50R | 3
Important safety instructions
Intended use/Liability
These wireless headphones are designed for use with mobile devices (e.g. mo-
bile music players, mobile phones, tablets) that support wireless communication
via Bluetooth. Compatible Bluetooth devices include those that support the fol-
lowing profiles: Hands Free Profile (HFP), Headset Profile (HSP), Advanced Audio
Distribution Profile (A2DP), and Audio/Video Remote Control Profile (AVRCP).
It is considered improper use when this product is used for any application not
named in the associated instruction manuals and product guides.
Sennheiser does not accept liability for damage arising from abuse or misuse of
this product and its attachments/accessories.
Safety instructions for the Lithium-Polymer battery pack
WARNING
In extreme cases, abuse or misuse of the Lithium-Polymer battery pack can lead
to:
• explosion
• fire development
• heat generation or
• smoke or gas development
Dispose of products with built-in rechargeable batteries at special
collection points or return them to your specialist dealer.
Only use rechargeable batteries and chargers recommended by
Sennheiser.
Charge products with built-in rechargeable batteries at ambient
temperatures between 10 and 40°C/50 and 104°F .
Switch battery-powered products off after use.
When not using the product for extended periods of time, charge its
built-in rechargeable batteries regularly (about every 3 months).
Do not heat above 70°C/158°F, e.g. do not expose to sunlight or
throw into fire.
Do not charge a product with built-in rechargeable batteries if the
product is obviously defective.

4 | HD 4.50BTNC/HD 4.50R
The HD 4.50BTNC/HD 4.50R Wireless headphones
The HD 4.50BTNC/HD 4.50R Wireless
headphones
The HD 4.50BTNC/HD 4.50R Wireless headphones offer great sound quality for
every day listening on the move. These headphones are the perfect companion
for your mobile devices, providing you with unrivalled listening pleasure and
easy communication with their NoiseGard™ Active Noise Cancellation feature,
long-lasting battery life, and robust, foldable design.
Features
• Closed circumaural design featuring Bluetooth® wireless technology
• Robust, foldable headband for easy storage on the go
• NoiseGard™ Active Noise Cancellation for optimum isolation from background
noise and outstanding audio performance
• Immediate pairing to smart devices using NFC
• Up to 25 hours battery life
• Comes with an attachable audio cable for use in environments where
Bluetooth® connectivity is not permitted

HD 4.50BTNC/HD 4.50R | 5
The HD 4.50BTNC/HD 4.50R Wireless headphones
Bluetooth
Theheadphonescomplywiththe Bluetooth4.0 standardandare compatiblewith
all Bluetooth 1.1, 1.2, 2.0, 2.1, 3.0 and 4.0 devices with the following Bluetooth
profiles: HFP (Hands-Free Profile), HSP (Headset Profile), AVRCP (Audio Video
Remote Control Profile) and A2DP (Advanced Audio Distribution Profile). The
headphones provide wireless freedom to give hands-free convenience during
phone calls or when listening to music.
NFC
Near Field Communication (NFC) is a short-range wireless technology that en-
ables connection and communication between NFC-capable electronic devices
by placing them near one another or with a single touch.
NoiseGard
The NoiseGard™ active noise compensation system is based on the principle
of cancelling out sound using “anti-sound”. Tiny microphones pick up low-
frequency ambient noise near the ear. The NoiseGard electronics use this noise
to generate a sound wave which is the exact opposite, the effect being that the
polarity reversed signal cancels most of the outside noise.
aptX®
With aptX® audio coding, you can be assured of crisp, pure and full stereo
sound. It allows you to not only hear, but experience and feel the audio as it was
intended. Utilizing aptX®, Bluetooth technology can now offer wireless audio
quality that is indistinguishable from the highest quality wired connection.

6 | HD 4.50BTNC/HD 4.50R
Package includes
Package includes
Headphones
Carry case
Audio cable with 2.5 mm and 3.5 mm jack plug
USB charging cable with micro-USB connector
Quick guide Quick guide
Safety guide Safety guide
A list of accessories can be found at www.sennheiser.com. For information
on suppliers, contact your local Sennheiser partner: www.sennheiser.com >
“Sales Partner”.

HD 4.50BTNC/HD 4.50R | 7
Product overview
Product overview
Overview of the headphones
1 Headband 6 Power button
2 Ear pads 7 Multifunction button
3 Ear cups 8 Volume +/- buttons
4 NFC panel 9 Audio input
5 LED 0 Micro-USB input
Overview of pictograms
Pictograms for pressing a button
Pictogram Meaning
1x
Press and immediately release the button
2x
Press the button twice
5s
Press the button and hold for 5 seconds
1
2
3
4
5
6
7
8
90

8 | HD 4.50BTNC/HD 4.50R
Product overview
Pictograms for the LED
Pictogram Meaning
The LED lights up
The intervals signify flashing
The LED lights up/flashes continuously
3s The time the LED lights up before blinking
Examples of pictograms that may be used in this manual:
Pictogram Meaning
5m
The LED flashes continuously
3s The LED lights up for 3 seconds, then off, and repeat
2s 2s The LED lights up, then off for 2 seconds, and repeat
The LED lights up continuously
1s The LED continuously flashes blue and red per second
The pictogram „i“
Notes marked with the pictogram “i” provide useful information on the
use of the headphones.

HD 4.50BTNC/HD 4.50R | 9
Product overview
Overview of the LED indications
LED indications during operation
LED Meaning
The headphones switch on
Pairing/connecting with a device is successful
The headphones switch off
The headphones are disconnected from the
device
The headphones are outside the Bluetooth
range of the device
Pairing with a device is unsuccessful
1s The headphones are in pairing mode
The device is/devices are successfully cleared
from the headphones
NoiseGard is activated/deactivated
(Bluetooth connection)
2s 2s The headphones are in idle mode (headphones
are paired but not connected to the device)
NoiseGard is activated
(audio cable connection with sufficient
battery life)
LED indications during calls
LED Meaning
Incoming call
Incoming call with an almost empty battery

10 | HD 4.50BTNC/HD 4.50R
Product overview
Overview of buttons
Power button
Press Function Page
2s
Switches the headphones on and off 19
1x
Activates/deactivates NoiseGard (audio cable
connection with sufficient battery life)
21
Multifunction button
Press Function Page
1x
Accepts/ends a call
Accepts an incoming call and holds the active call
Plays/pauses a track
24
24
23
2x
Redials the last number called
Holds/unholds a call
Accepts an incoming call and ends the active call
Toggles between 2 active calls
25
24
24
24
2s
Rejects a call
Activates the voice control
Transfers a call between the smartphone and the
headphones
24
26
25
Plays the next track 23
Plays the previous track 23
Rewinds a track 23
Fast-forwards a track 23
button

HD 4.50BTNC/HD 4.50R | 11
Product overview
Volume +/- buttons
Press Function Page
1x
Increases/decreases the volume 19
+
-

12 | HD 4.50BTNC/HD 4.50R
Getting started
Getting started
Charging basics
A complete charging cycle takes about 2 hours. Before using the headphones
for the first time, charge the headphones for a complete charging cycle without
interruption.
When the battery is almost empty or when the headphones are being charged,
the LED lights up or flashes as indicated in the following table and a voice prompt
announces the charge condition of the battery. When the battery charge drops
to a low level, a voice prompt asks you to recharge the headphones.
It is recommended to charge the headphones using only the supplied USB
cable. If you charge the headphones using an external USB power adapter, it
is recommended to use an adapter with an output rating of 500 mA or higher.
LED Meaning Voice prompt
Battery is almost empty
(less than 2% charged) “recharge headset”
Battery is less than 11% charged “less than 2 hours
play time”
Battery is less than 23% charged “between 2 and 6 hours
play time”
Battery is less than 45% charged “between 6 and 12 hours
play time”
Battery is more than 45% charged “more than 12 hours
play time”
5 m Battery is fully charged “more than 12 hours
play time”
2h

HD 4.50BTNC/HD 4.50R | 13
Getting started
Charging the headphones
1. Connect the micro-USB plug of the charging cable to the micro-USB input of
the headphones.
2. Connect the USB plug to the USB port of your computer. If you are using an
external power adapter, connect the USB plug to the power adapter or to the
USB car charger adapter, and connect to the power source.
The LED flashes/lights up depending on the battery life of the headphones.
The headphones utilize an intelligent battery charging technology that pre-
vents overcharging.
*Accessories not included.
*
*
*
2 h
CHARGING TIME
1 2
Battery life indicator on your device
The battery life of your headphones may also be displayed on the screen of your
smartphone or device.

14 | HD 4.50BTNC/HD 4.50R
Getting started
Pairing the headphones
CAUTION
Danger of malfunction!
The transmitted radio waves of mobile phones can impair the
operation of sensitive and unprotected devices.
XOnly make calls with the headphones in locations where Bluetooth
is permitted.
The HD 4.50BTNC/HD 4.50R Wireless headphones comply with the Bluetooth
4.0 standard. In order that data can be transmitted wirelessly using Bluetooth,
you have to pair your headphones with a compatible Bluetooth device that sup-
ports the following profiles:
XHands Free Profile (HFP)
XHeadset Profile (HSP)
XAudio/Video Remote Control Profile (AVRCP)
XAdvanced Audio Distribution Profile (A2DP)
When you switch the headphones on for the first time, they automatically go to
pairing mode. If the headphones have already been paired with a few devices,
they automatically try to connect to the most-recently connected Bluetooth
device when switched on. The headphones can save the connection profiles of
up to eight Bluetooth devices or smartphones.
You can instantly pair the headphones with your device if the device supports
NFC.
paired
paired +
connected

HD 4.50BTNC/HD 4.50R | 15
Getting started
Pairing the headphones with a Bluetooth device using NFC
The following sections describe, using a smartphone as an example, how to
pair your HD 4.50BTNC/HD 4.50R Wireless headphones with a Bluetooth device
using NFC. If the instructions provided do not work on your device, proceed as
described in the instruction manual of the device.
You can pair the headphones with other devices using NFC regardless of the
headphones’ power state (on or off).
1. Activate NFC on your smartphone.
2. Scan the smartphone to the NFC panel on the left ear cup of the headphones.
You hear the voice prompt “power on” and a beep sound. The LED flashes
blue and red.
3. Click “Yes” if the pairing confirmation dialog appears on the screen of your
smartphone (this step may vary depending on your smartphone).
If pairing was successful, you hear the voice prompt “connected”. The LED
flashes blue 3 times.
LeftL
scan
Menu
NFC on
NFC off
Connect to Bluetooth device?
Yes
No
1 2
3
1s 1s
› connected‹

16 | HD 4.50BTNC/HD 4.50R
Getting started
Pairing the headphones with a Bluetooth device
Ensure that the headphones are within the 20 cm range of your smartphone
when performing this procedure.
1. Switch the headphones on (see page 19).
– Ifyoupairthe headphonestothedeviceforthefirsttime,theyautomatically
go to pairing mode.
– If the headphones don’t automatically go to pairing mode, switch the
headphones off and press the power button again for 4 seconds or until
you hear the voice prompt “power on” and a beep sound.
The LED flashes blue and red. The headphones are in pairing mode.
2. Activate Bluetooth on your smartphone.
3. On your smartphone, start a search for Bluetooth devices.
All active Bluetooth devices in the proximity of your smartphone are
displayed.
4. From the list of found Bluetooth devices, select “HD 4.50BTNC”/ “HD 4.50R”.
If necessary, enter the default PIN code “0000”.
If pairing was successful, you hear the voice prompt “connected”. The LED
flashes blue 3 times.
Menu
Add Device
Menu
Bluetooth on
Bluetooth off
20 cm
1s 1s
› power on ‹
2s
HD 4.50BTNC / HD 4.50R
HD 4.50BTNC / HD 4.50R
Keyword: 0000
1
2 3
4
› connected‹

HD 4.50BTNC/HD 4.50R | 17
Getting started
Disconnecting the headphones from your Bluetooth device
XDeactivate Bluetooth on your smartphone.
The headphones are disconnected from the smartphone. The headphones
then search for other paired devices. If no device is found, you hear the voice
prompt “lost connection”. The headphones go to idle mode.
› lost connection ‹
Menu
Bluetooth on
Bluetooth off

18 | HD 4.50BTNC/HD 4.50R
Getting started
Adjusting the headband
For good sound quality and best possible wearing comfort, you can adjust the
ear pad location on the headband to properly match the size of your head.
XWear the headphones so that the headband runs over the top of your head.
XAdjust the location of the ear pads by moving the ear cups up and down the
headband slider until:
– your ears are comfortably covered by the ear pads,
– you feel even, gentle pressure around your ears,
– a snug fit of the headband on the head is ensured.

HD 4.50BTNC/HD 4.50R | 19
Using the headphones
Using the headphones
Switching the headphones on
WARNING
Danger due to high volume levels!
Listening at high volume levels for long periods of time can lead to
permanent hearing defects.
XBefore putting the headphones on, set the volume to a low level.
XDo not continuously expose yourself to high volume levels.
XPress the power button for 2 seconds.
You hear the voice prompts “power on” and “connected” and the LED flashes
blue 3 times.
2s
› connected ‹
› power on‹
Switching the headphones off
XPress the power button for 2 seconds.
You hear the voice prompt “power off” and the LED flashes red 3 times.
2s
› power off ‹