Sennheiser HD 450BT Wireless Over Ear Headphones User guide

HD 450BT

SEBT4

Instruction manuals and product support

Bedienungsanleitungen und Produktbetreuung

Manuels d’utilisation et assistance produit

Instrucciones de uso y soporte del producto

Manuali d’istruzioni e supporto prodotto

Bedieningsinstructies en productondersteuning

Manuais de instruções e assistência ao produto

Instrukcje obsługi i wsparcie produktowe

Brugsanvisninger og produkthjælp

EN Quick Guide

DE Kurzanleitung

FR Guide rapide

ES Instrucciones resumidas

PT Guida rápidos

NL Beknopte handleiding

IT Guida rapida

DA Snabbguide

SV Bruksanvisning

Apple, the Apple logo and Siri are trademarks of Apple Inc., registered in the U.S. and other

countries. App Store is a service mark of Apple Inc. Android and Google play are registered

trademarks of Google Inc. The Bluetooth® word mark and logos are registered trademarks

owned by Bluetooth SIG, Inc. and any use of such marks by Sennheiser electronic GmbH &

Co. KG is under license.

www.sennheiser.com

www.sennheiser.com/download

www.sennheiser.com/smartcontrol

Sennheiser electronic GmbH & Co. KG

Am Labor 1, 30900 Wedemark, Germany

www.sennheiser.com, Publ. 10/19,

587116/A02, 770-00236

Safety

Guide

Quick

Guide

USB-A

USB-C

2.5 mm

3.5 mm

e Download the free Sennheiser Smart Control app.

Carry Case

Right R

USB-A

USB-C

2 HRS

LED off

Audio cable

Pakkaussisältö | Περιεχόμενα πακέτου | Zestaw obejmuje |

Ambalaj içeriği | Комплект поставки |

| | | 㼱㋪᯹㇮⚁| Paket termasuk

Kuulokkeiden lataaminen | Φόρτιση των ακουστικών |

Ładowanie słuchawek | Kulaklık setini şarj etme | Зарядка

аккумуляторов наушников | |

| | 䄩‡㼵㣮㍉䂝᥵ | Mengisi baterai

headphone

Käytä sovellusta kuulokkeiden käyttöönottoa ja muita

toimintoja varten. | Χρησιμοποιήστε την εφαρμογή για τη

ρύθμιση και τις πρόσθετες λειτουργίες των ακουστικών. | Aplikację

można wykorzystać do konﬁguracji i ustawień dalszych

funkcji słuchawek. | Uygulamayı kulaklığın kurulumu ve diğer

işlevleri için kullanınız. | Используйте приложение для

настройки и доступа к другим функциям наушников. | ቿኴ዇ት

∎䞷ሺᇬኁ዁ኸዐቑሸቬቍቮ㳮厌ት岼⸩ሺ቉ሲቃሸ_庆抩扖ㄣ

䞷䲚ㄞ幍函勂㧉㒥∎䞷勂㧉䤓␅⸒┮厌ᇭ_嵚択拝㑘䞷䲚ㄞ岼⸩

勂㳮㒥∎䞷勂㳮䤓␅Ⅵ┮厌ᇭ_뾙麑꬀넍鿅鲙ꌭ韥鱚ꗄ꫙뇊냹

겙뼾뼍ꇙꐩ꼦냹ꩡ끞뼍겢겑꿙 | Gunakan aplikasi untuk

peralatan dan fungsi lain earphone.

Active Noise Cancellation ANC

ON/OFF

Power ON/OFF

Right R

“Connected“ “Lost connection“

Left L

Right R

Voice assistant

ON/OFF

Siri, Google Assistant,

Baidu, ...

... depending on

mobile phone.

Press

1x

ON

OFF

ON

2s

Hold

2s

Hold

Power

button LED

Activating/deactivating the voice assistant |

Sprachassistent aktivieren/deaktivieren | Activer-

/désactiver l'assistant vocal | Activar/desactivar el

asistente personal | Ativar/desativar assistente de

voz | Spraakassistent activeren/deactiveren |

Attivare/disattivare l'assistente vocale | Aktivering/-

deaktivering af taleassistenten | Aktivera/avaktivera

talassistent

Press

1x

Press

1x

Press

1x

Switching the headphones on/off | Kopfhörer ein-/ausschal-

ten | Allumer/éteindre le casque | Encender/apagar los

auriculares | Li-gar/desligar os auscultadores | De hoofdtele-

foon in-/uitschakel-en | Accensione/spegnimento delle

cufﬁe | Sådan tændes og slukkes hovedtelefonerne | Hörlurar

slås på/av

Using the active noise cancellation ANC | Aktive Geräusch-

unterdrückung ANC verwenden | Utiliser la réduction active

de bruit ANC | Utilizar la atenuación activa del ruido ANC |

Utilizar o controlo ativo de ruído ANC | Actieve ruisonder-

drukking ANC toepassen | Utilizzare la soppressione attiva

dei rumori ANC | Anvendelse af støjundertrykkelse ANC |

Använda aktiv dämpning av bakgrundsljud ANC

“Pairing“

1 2

3

HD 450BT

Keyword: 0000

4

“Connected“

Menu

Bluetooth on

Bluetooth off

Menu

Bluetooth on

Bluetooth off

Menu

Add Device

20 cm

OFFOFF

4s

Hold

Right R

Pairing and connecting to a Bluetooth device | Mit einem

Bluetooth-Gerät koppeln (Pairing) und verbinden | Appairer et

connecter le casque à un appareil compatible Bluetooth |

Sincronizar y conectar con un dispositivo Bluetooth |

Emparelhar e ligar a um dispositivo Bluetooth | Met een

Bluetoothapparaat pairen en verbinden | Abbinamento e

collegamento a un dispositivo Bluetooth | Parring og

tilslutning til en Bluetooth-enhed | Anslut till en Bluetooth-en-

het

1 2

3

OFF

Right R

Audio cable

2.5 mm 3.5 mm

OUTIN

1

2

1

2

Using the audio cable (ﬂight mode) | Audiokabel benutzen

(Flugmodus) | Utilisation du câble audio (mode Avion) | Usar

elcable de audio (modo de avión) | Utilizzo del cavo audio

(modalità aereo) | De audiokabel gebruiken (vliegtuigmodus) |

Utilizar o cabo áudio (modo de voo) | Używanie przewodu

audio (tryb samolotowy) | Sådan bruges lydkablet (ﬂymodus)

Folding and storing | Falten und aufbewahren | Plier et

stocker | Plegar y conservar | Dobrar e guardar | Vouwen

en opbergen | Piegare e conservare | Foldning og

opbevaring | Vika ihop och förvara

Right R

Adjusting the volume | Lautstärke einstellen | Régler le volume |

Ajustar el volumen | Ajustar o volume | Volume instellen | Imposta-

zione del volume | Indstilling af lydstyrke | Ställ in volymen

[Z]

SENN

HEISER

HD

350BT

SEBT3

HD

450BT

SEBT4

EN

Safety Guide

DE

Sicherheitshinweise

FR

Consignes de securite

ES

lndicaciones de seguridad

PT

Guia de seguranc,;a

NL Veiligheidsgids

IT

Guida per

la

sicurezza

DA

Sikkerhedsanvisninger

SV

Sakerhetsanvisningar

Fl

Turvaohjeita

EL

Yrrood~w:;

acr<paAf:ia<;

PL

lnstrukcja

bezpieczeristwa

TR

Gi.ivenlik Kilavuzu

RU

111HCTPYK4i-15l

no

6e3onacHOCTi-1

JA

t-77'-1151'

r'

ZH

3i:~m;;J;

TW 3i:~51~~J~

KO

'2.1-~

::X::I~

ID

Petunjuk Keselamatan

Sennheiser electronic GmbH & Co,

KG

Am

Labor 1, 30900 Wedemark, Germany

www.sennheiser.com Publ.

11/19,

587113/A01*, 770-00248

EN

English

Important

safety instructions

t>

Read

the

instruction

manual,

safety

guide,

quick

guide

(as

supplied)

carefully

and

completely

before

using

the

product.

[> Always

include

this

safety

guide

when

passing

the

product

on

to third

parties.

t>

Do

not

use

an

obviously

defective

product.

[>

Use

only

the

product

in

environments

where

wireless

Bluetooth

®

trans-

mission

is

permitted.

Preventing

damage

to

health

and

accidents

t>

Do

not

listen

at

high

volume

levels

for

long

periods

of

time

to

prevent

hearing

damage.

t>

The

product

generates

stronger

permanent

magnetic

fields

that

could

cause

interference

to

cardiac

pacemakers,

implanted

defibrillators

(ICDs)

and

other

implants.

Always

maintain

a

distance

of

at

least

3.94

" (10

cm)

between

the

product

component

containing

the

magnet

and

the

cardiac

pacemaker,

im-

planted

defibrillator

or

other

implant.

t>

Keep

the

product,

accessories

and

packaging

parts

out

of

reach

of

chil-

dren

and

pets

to

prevent

accidents.

Swallowing

and

choking

hazard.

t>

Do

not

use

the

product

in

an

environment

that

requires

your

special

at-

tention

(e.g. in

traffic).

Preventing

damage

to

the

product

and

malfunctions

t>

Always

keep

the

product

dry

and

do

not

expose

it

to

extreme

tempera-

tures

(hairdryer,

heater,

extended

exposure

to

sunlight,

etc.)

to

avoid

cor-

rosion

or

deformation.

The

normal

operating

temperature

is

from

0 °C

to

40

°

C/32

°F

to

104 °

F.

t>

Use

only

attachments/accessories/spare

parts

supplied

or

recommend-

ed

by

Sennheiser.

t>

Only

clean

the

product

with

a

soft,

dry

cloth.

Safety

instructions

for

the

Lithium-Polymer

battery

pack

WARNING

=l

In

extreme

cases

,

rechargeable

batteries

may

leak

and

may

cause

the

following

hazards

if

abused

or

misused:

•

explosion

•

heat

generation

•

fire

development

•

smoke

or

gas

development

Dispose

of

defective

products

with

built-in

rechargeable

batteries

at

special

collection

points

or

return

them

to

your

specialist

dealer.

Only

use

rechargeable

batteries

recommended

by

Sennheiser

and

the

appropriate

chargers.

Only

charge

the

product/

rechargeable

batteries

at

ambient

temperatures

between

10 °

C/50

°F

and

40

°

C/104

°

F.

Switch

battery

pack-powered

products

off

after

use.

When

not

using

for

extended

periods

of

time,

recharge

the

product/

rechargeable

batteries

regularly

(about

every

3

months).

Do

not

heat

the

product/

rechargeable

batteries

above

70

°C/158

°

F.

Avoid

exposure

to

sunlight

and

do

not

throw

the

product/

rechargeable

batteries

into

fire.

Notes

on

data

collection

and

processing

and

on

firmware

updates

This

product

stores

individual

settings

such

as

the

volume,

the

sound

profi-

les

and

the

Bluetooth

addresses

of

paired

devices.

This

data

is

required

for

the

operation

of

the

product

and

is

not

transferred

to

Sennheiser

or

compa-

nies

commissioned

by

Sennheiser

and

is

not

processed.

Using

the

"

Sennheiser

Smart

Control"

app,

you

can

update

the

firmware

of

the

product

for

free

via

an

Internet

connection.

If

the

device

on

which

the

app

is

installed

is

connected

to

the

Internet,

the

following

data

is

automati-

cally

transferred

to

and

processed

by

Sennheiser

servers

in

order

to

provide

and

transfer

suitable

firmware

updates:

hardware

indentifier,

hardware

re-

vision

number,

firmware

version

of

the

product

and

version

of

the

app.

The

data

will

only

be

used

as

specified

and

will

not

be

stored

permanently.

If

you

do

not

want

this

data

to

be

transferred

and

processed,

do

not

connect

to

the

Internet.

Intended

use/Liability

These

headphones

are

designed

as

an

accessory

for

Bluetooth

compliant

devices

for

wireless

audio

communication

like

music

playback

and

tele-

phone

calls

via

Bluetooth

wireless

technology.

It

is

considered

improper

use

when

this

product

is

used

for

any

application

not

named

in

the

associated

product

guides.

Sennheiser

does

not

accept

liability

for

damage

arising

from

abuse

or

mis-

use

of

this

product

and

its

attachments/accessories.

Sennheiser

is

not

liable

for

damages

to

USB

devices

that

are

not

consistent

with

the

USB

specifications.

Sennheiser

is

not

liable

for

damages

resulting

from

the

loss

of

connection

due

to

flat

or

over

aged

rechargeable

batteries

or

exceeding

the

Bluetooth

transmission

range.

Before

putting

the

product

into

operation

please

observe

the

respective

country-specific

regulations.

Manufacturer

Declarations

More

information

on

legal

compliance

labels

can

be

found

at

the

end

of

this

document.

Warranty

Sennheiser

electronic

GmbH

&

Co.

KG

gives

a

warranty

of

24

months

on

this

product.

For

the

current

warranty

conditions,

please

visit

our

website

at

www.sennheiser.com

or

contact

your

Sennheiser

partner.

FOR

AUSTRALIA

ONLY

Sennheiser

goods

come

with

guarantees

that

cannot

be

excluded

under

the

Australian

Consumer

Law.

You

are

entitled

to

a

replacement

or

refund

for

a

major

failure

and

compensation

for

any

other

reasonably

foreseeable

loss

or

damage.

You

are

also

entitled

to

have

the

goods

repaired

or

replaced

if

the

goods

fail

to

be

of

acceptable

quality

and

the

failure

does

not

amount

to

a

major

failure.

This

warranty

is

in

addition

to

other

rights

or

remedies

under

law.

Nothing

in

this

warranty

excludes,

limits

or

modifies

any

liability

of

Sennheiser

which

is

imposed

by

law,

or

limits

or

modifies

any

remedy

available

to

the

consumer

which

is

granted

by

law.

To

make

a

claim

under

this

Warranty,

C

ontact:

Sennheiser

Technical

Services

and

Spare

Parts

Sales,

c/o

Linfox,

Gate

3, 1 Fox

Lane,

Erskine

Park,

2759,

NSW

Australia,

phone:

+61 2

9910

6700

email:

[email protected]

All.

expenses

of

claiming

the

warranty

will

be

borne

by

the

person

making

the

claim.

The

Sennheiser

International

Warranty

is

provided

by

Sennheiser

Australia

Pty

Ltd (ABN

68165

388

312), The Zenith,

Tower

A,

L14,

821

Pacific

Highway

Chatswood

NSW

2067,

Australia.

In

compliance

with

the

following

requirements

•

Product

Safety

Directive

(2001/95/EC)

•

Compliant

to

Sound

Pressure

Limits

according

to

country-specific

re-

quirements

EU

Declaration

of

Conformity

• RoHS

Directive

(2011/65/EU)

CE

Hereby,

Sennheiser

electronic

GmbH

&

Co.

KG

declares

that

the

radio

equipment

type

SEBT3,

SEBT4

is

in

compliance

with

Radio

Equipment

Di-

rective

(2014/53/EU).

The

full

text

of

the

EU

declaration

of

conformity

is

available

at

the

following

internet

address:

www.sennheiser.com/download.

Notes

on

disposal

•

Battery

Directive

(2006/66/EC

&

2013/56/EU)

• WEEE

Directive

(2012/19/EU)

The

symbol

of

the

crossed-out

wheeled

bin

on

the

pro-

duct,

the

battery/rechargeable

battery

(if

applicable)

and/or

the

packaging

indicates

that

these

products

must

not

be

disposed

of

with

normal

household

waste,

but

must

be

disposed

of

separately

at

the

end

of

their

operational

life-

time.

For

packaging

disposal,

please

observe

the

legal

regulations

on

waste

segregation

applicable

in

your

country.

Further

information

on

the

recycling

of

theses

products

can

be

obtained

from

your

municipal

administration,

from

the

municipal

collection

points,

or

from

your

Sennheiser

partner.

The

separate

collection

of

waste

electrical

and

electronic

equipment,

batter-

ies/rechargeable

batteries

(if

applicable)

and

packagings

is

used

to

promote

the

reuse

and

recycling

and

to

prevent

negative

effects

caused

by

e.g.

poten-

tially

hazardous

substances

contained

in

these

products.

Herewith

you

make

an

important

contribution

to

the

protection

of

the

environment

and

public

health.

HD 450BT | 1

HD 450BT

Around-ear headphones

Model: SEBT4

Instruction manual

Use the search function, the navigation (left) or the following links:

Start

“Product overview”

“Getting started”

“Using the headphones”

“FAQ/If a problem occurs ...”

“Specifications”

Sennheiser electronic GmbH & Co. KG

Am Labor 1

30900 Wedemark

Germany

www.sennheiser.com

Version: 02/21 A03

Important safety instructions

2 | HD 450BT

Important safety instructions

▷Read this instruction manual carefully and completely before

using the product.

▷Always include this instruction manual when passing the product

on to third parties.

▷Do not use the product if it is obviously defective or makes loud,

unusual (whistling or beeping) noise.

▷Only use the product in environments where Bluetooth® wireless

transmission is permitted.

Preventing damage to health and accidents

▷Protect 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.

▷The product generates stronger permanent magnetic

fields that could cause interference with cardiac pace-

makers, implanted defibrillators (ICDs) and other

implants. Always maintain a distance of at least 3.94"/10 cm

between the product component containing the magnet and the

cardiac pacemaker, implanted defibrillator, or other implant.

▷Keep the product, accessories and packaging parts out of reach

of children and pets to prevent accidents. Swallowing and chok-

ing hazard.

▷Do not use the product in an environment that requires your spe-

cial attention (e.g. in traffic or when performing skilled jobs).

Preventing damage to the product and malfunctions

▷Always keep the product dry and do not expose it to extreme tem-

peratures (hairdryer, heater, extended exposure to sunlight, etc.)

to avoid corrosion or deformation. The normal operating tempera-

ture is from 0 to 40 °C/32 to 104 °F.

▷To avoid loud, unusual (whistling or beeping) noise and to ensure

proper noise cancellation, do not cover the microphone openings

of the active noise cancellation circuitry located on the outside of

the ear cups.

▷Use only attachments/accessories/spare parts supplied or rec-

ommended by Sennheiser.

▷Clean the product only with a soft, dry cloth.

▷Use the product with care and store it in a clean, dust-free envi-

ronment.

Safety instructions for the lithium polymer rechargeable battery

WARNING

If abused or misused, the rechargeable batteries may leak.

In extreme cases, they may even present a risk of:

• heat generation,

• fire development,

•explosion,

•smoke or gas development.

Important safety instructions

HD 450BT | 3

Notes on data collection and processing and on firmware updates

This product stores individual settings such as the volume and the

Bluetooth addresses of paired devices. This data is required for the

operation of the product and is not transferred to Sennheiser or com-

panies commissioned by Sennheiser and is not processed.

Using the “Sennheiser Smart Control” app, you can update the firm-

ware of the product for free via an Internet connection. If the device

on which the app is installed is connected to the Internet, the follow-

ing data is automatically transferred to and processed by Sennheiser

servers in order to provide and transfer suitable firmware updates:

hardware identifier, hardware revision number, firmware version of

the product, operating system type (Android, iOS) and version, ver-

sion of the app. The data will only be used as specified and will not

be stored permanently.

If you do not want this data to be transferred and processed, do not

connect to the Internet.

Only use rechargeable batteries and chargers

recommended by Sennheiser.

Only charge the product / rechargeable batteries at

ambient temperatures between +10 °C to +40 °C/50 °F

to 104 °F.

Do not heat the product / rechargeable batteries above

+70 °C/140 °F. Avoid exposure to sunlight and do not

throw the product / rechargeable batteries into fire.

When not using the product / rechargeable batteries for

extended periods of time, charge them regularly (about

every three months).

Switch rechargeable battery-powered products off after

use.

Dispose of defective products with built-in rechargeable

batteries at special collection points or return them to

your specialist dealer.

Important safety instructions

4 | HD 450BT

Intended use/Liability

These headphones have been designed as an accessory for Blue-

tooth compliant devices. They are intended for wireless audio com-

munication such as music playback and phone calls via Bluetooth

wireless technology.

It is considered improper use when the product is used for any appli-

cation not named in the corresponding product documentation.

Sennheiser does not accept liability for damage arising from misuse

or improper use of this product and its attachments/accessories.

Sennheiser is not liable for damages to USB devices that are not con-

sistent with the USB specifications.

Sennheiser is not liable for damages resulting from the loss of con-

nection due to flat or overaged rechargeable batteries or exceeding

the Bluetooth transmission range.

Before putting into operation, please observe the respective coun-

try-specific regulations.

Package contents

HD 450BT | 5

Package contents

Online you can find:

• this detailed instruction manual and additional information

www.sennheiser.com/download

•the Sennheiser Smart Control app for configuring the head-

phones and for additional functions www.sennheiser.com/smart-

control

HD 450BT around-ear headphones

Model: SEBT4

USB charging cable with USB-C and USB-A connec-

tor

Analog audio cable with 3.5 mm jack plug and 2.5 mm

jack plug, length approx. 1.5 m

Carry case

Quick guide

Safety guide

A list of accessories can be found on the HD 450BT product

page at www.sennheiser.com. Contact your local Sennheiser

partner: www.sennheiser.com/service-support.

Product overview

6 | HD 450BT

Product overview

HD 450BT model: SEBT4

Headband

Ear cup joints

Ear cups, steplessly adjustable

On/off button for the headphones and the active noise

cancellation ANC

pressing for 4 seconds activates the Bluetooth pairing

mode

pressing 1x activates/deactivates ANC

LED

Input for analog audio cable;

when a cable is connected, flight mode is activated/Blue-

tooth is deactivated

USB-C socket for charging

Right R

Left L

4

5

6

2

3

7

A

C

B

9

1

8

0

Product overview

HD 450BT | 7

Overview of the LED display

During operation

During phone calls

Volume – button (volume down)

Volume + button (volume up)

3-way multi-function button for music and call functions

Voice assistant button

Ear pads

Speech microphones (2 pcs.) for phone calls

LED Meaning; the headphones

flashes blue 3x switch on

flashes blue 3x are connected to a device via Blue-

tooth

flashes red/

blue are in Bluetooth pairing mode

flashes red 3x

are not connected to a device via

Bluetooth or the connection has been

lost

flashes purple

3x ANC is activated/deactivated

LED Meaning

flashes blue Incoming call

flashes red

Incoming call and the rechargeable

battery of

the headphones is almost empty

If the LED does not light up immediately during charging, clean

the charging socket and charge the headphones until the LED

lights up again (> 11).

3x

Product overview

8 | HD 450BT

Notes on voice prompts

The headphones output voice prompts for various functions (see

examples below).

Notes on beeps/acoustic signals

The headphones output beeps/acoustic signals for the following

functions.

Voice prompt Meaning/headphones

“Power on” are switched on

“Power off” are switched off

“Connected” are connected via Bluetooth

“Lost connection” are not connected via Bluetooth

“Pairing” are in Bluetooth pairing mode

“Call rejected” incoming call rejected

“Call ended” call ended

“More than xx hours

playtime”

Rechargeable battery has the

stated charge level

“Recharge headset” Rechargeable battery is empty.

Recharge the headphones.

Acoustic signal Meaning/headphones...

2x low-pitched beep minimum volume is reached

2x high-pitched beep maximum volume is reached

Getting started

HD 450BT | 9

Getting started

1. Charging the rechargeable battery

The headphones' rechargeable battery is not fully charged upon

delivery. Before using the headphones for the first time, charge the

rechargeable battery for a complete charging cycle without interrup-

tion (> 11).

2. Installing the Smart Control app on your

smartphone

The Sennheiser Smart Control app allows you to use all functions

and settings of the headphones and to e.g. adjust the sound to your

liking using the equalizer (> 15).

3. Connecting the headphones to a Bluetooth

device

Connect the headphones to your smartphone via Bluetooth (> 12).

USB-AUSB-C

“Sennheiser Smart Control”

4s

Hold

Getting started

10 | HD 450BT

4. Putting the headphones on and adjusting the

headband

For good sound quality and best possible wearing comfort, the head-

band can be adjusted to properly fit your head (> 17).

Using the headphones

HD 450BT | 11

Using the headphones

Information on the rechargeable battery

and the charging process

The headphones have a built-in rechargeable battery. A complete

charging cycle takes approx. 2 hours. Before using the headphones

for the first time, charge the rechargeable battery for a complete

charging cycle without interruption.

When the headphones are being charged, the LED lights up (> 7).

Once the headphones are fully charged, the LED flashes blue for 5

minutes and then goes off. When the battery charge drops to a criti-

cal level, a voice prompt asks you to recharge the headphones

(“Recharge headset”).

Sennheiser recommends using the supplied USB cable and a com-

patible standard USB power supply for charging the headphones.

While the headphones are being charged, you can still listen to

music or make phone calls. In this case, however, the charging time

may be longer.

Charging the headphones' rechargeable

battery

1. Connect the USB-C connector of the charging cable to the USB

socket of the headphones.

2. Connect the USB-A connector to a corresponding socket of a USB

power source (*to be ordered separately). Make sure that the USB

power source is connected to the power supply system.

The charging process of the headphones begins. The LED dis-

plays the charge status:

Right R

2 HRS

USB-A

USB-C

LED Off

*

Using the headphones

12 | HD 450BT

Connecting the headphones to a

Bluetooth device

To be able to use the Bluetooth connection, you must register both

devices (headphones and e.g. smartphone) once. This process is

called pairing.

If operation differs from the steps mentioned, also refer to the

instruction manual of the Bluetooth device you are using.

Information on the Bluetooth wireless

connection

The headphones are compatible with Bluetooth 5.0.

If your audio source supports one of the following high-resolution

audio encoding methods, music is automatically played in high audio

quality: aptX, aptX LL or AAC. Otherwise the headphones will play

your music in normal audio quality (SBC).

Paired devices establish the Bluetooth wireless connection immedi-

ately after switch-on and are ready for use.

On switch-on, the headphones automatically try to connect to the

last two connected Bluetooth devices. The headphones can save the

connection profiles of up to eight Bluetooth devices with which they

have been paired. Audio playback is only possible from one device at

a time.

If you pair the headphones with the ninth Bluetooth device, the saved

connection profile of the least used Bluetooth device will be over-

written. If you want to re-establish a connection with the overwritten

Bluetooth device, you have to pair the headphones again.

LED Meaning

lights up red Rechargeable battery is being charged

flashes blue

for 5 minutes,

the LED then

goes off

Rechargeable battery is fully charged

If the LED does not light up immediately during charging, clean

the charging socket and charge the headphones until the LED

lights up again (> 11).

You can speed up the charging process by charging the head-

phones when they are switched off.

for 5 min

LED Off

When you switch on the headphones for the first time, they

automatically switch to pairing mode.

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Sennheiser HD 450BT Wireless Over Ear Headphones User guide

Sennheiser HD 450BT Wireless Over Ear Headphones User guide

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