M 278 BTB PH - Radio MUSE - Free user manual and instructions

Brand	Muse
Model	M 278 BTB PH 3987B
Product Type	Bluetooth Stereo Headset
Bluetooth Version	V5.4
Music Playtime	Up to 60 hours (fully charged)
Charging Time	2 to 3 hours
Battery	Built-in rechargeable 450 mAh / 3.7 V
Speaker Diameter	40 mm
Sensitivity	98 dB ± 3 dB
Frequency Response	20 Hz - 20 kHz
Impedance	32 Ω
Magnet Type	NdFeb
Comfort	Adjustable Headband
Hands‑free Function	Yes
Connectivity	USB‑C port (charging), 3.5 mm auxiliary input
Included Cables	USB‑C cable (80 cm), auxiliary cable (100 cm)
Included Accessories	Carrying Pouch
Dimensions (H x W x D)	193 x 167 x 80 mm
Net Weight	0.24 kg
Material	Plastic and Metal
Care	Clean with a soft, dry cloth. Do not use chemicals.
Safety	Do not expose to water or moisture. Keep out of reach of children.
Repairability	Built-in battery not user‑replaceable. For any repairs, contact customer service.
General Information	Compatible with all Bluetooth devices.

Frequently Asked Questions - M 278 BTB PH MUSE

How to charge the headset?

Connect the supplied USB‑C cable to the headset's charging port and to a power adapter (not included) or a computer. Charging time is about 2 to 3 hours.

How to pair the headset with a phone?

Turn on the headset by holding the power button until the indicator flashes blue and red. Enable Bluetooth on your phone, select M‑278 BT from the list of available devices.

What is the battery life?

Music playtime is up to 60 hours after a full charge. In standby mode, it is even longer.

Can I use the headset while charging?

Yes, you can use the headset in wired mode via the auxiliary cable while charging. In Bluetooth mode, charging is not recommended but possible.

How to make a hands‑free call?

The headset has a built‑in microphone. During a call, use the multi‑function button to answer, hang up, or reject a call. The hands‑free function is automatically active.

How to clean the headset?

Turn off the headset and remove cables. Use a soft, dry cloth to wipe surfaces. Never use liquids or abrasive products. Avoid touching the speaker diaphragm.

What to do if the headset does not turn on?

Check that the battery is charged. Connect the USB‑C cable to a power source. If the indicator does not light up, try a different cable or adapter. If the problem persists, contact customer service.

Is the headset waterproof?

No, the headset is not waterproof. It should not be exposed to water or excessive humidity. Store it in the provided carrying pouch when not in use.

Can I replace the battery myself?

The battery is built‑in and not designed to be replaced by the user. Any attempt to open it voids the warranty. Contact customer service for replacement.

What cables are included in the box?

The box contains a USB‑C charging cable (80 cm), a 3.5 mm auxiliary cable (100 cm), and a carrying pouch. The power adapter is not included.

USER MANUAL M 278 BTB PH MUSE

Collection of inspiration

M-278 BTW

M-278 BT

M-278 FB

CASQUE BLUETOOTH STÉRÉO

FONCTIONS

Bluetooth version: V5.4

Type d'aimant: NdFeb

220 mm (H) × 85 mm (P) × 210 mm (L)

Poids brut: 0.42 kg

Code: 3700460207533

COLISAGE

6 pièces

250 mm (H) × 280 mm (P) × 430 mm (L)

Poids brut: 3 kg

Code: 13700460207530

CHARGEMENT CONTAINER

Adjustable headband for maximum comfort

Music playback time: Up to 60 hours

(fully charged)

Charging time: 2 \~ 3 hours

Built-in rechargeable battery

(450mAh/3.7V)

Hands-Free

SPECIFICATIONS

Sensitivity: 98dB±3dB

Magnet type: NdFeb

Frequency response: 20Hz to 20KHz

Impedance: 32Ω

Speaker diameter: 40 mm

Aux-in cable: 100cm

USB-C cable: 80cm

CONNECTIONS

USB-C charging port

Aux in jack

POWER SUPPLY

Built-in rechargeable battery

(450mAh/3.7V)

ACCESSORIES

USB-C charging cable

Aux in cable (3.5mm)

Pouch

PRODUCT

193 mm (H) × 80 mm (W) × 167 mm (L)

Net weight: 0.24 kg

GIFT BOX

220 mm (H) × 85 mm (W) × 210 mm (L)

Gross weight: 0.42 kg

Code: 3700460207533

EXPORT CARTON

6 pieces

250 mm (H) x 280 mm (W) x 430 mm (L)

Gross weight: 3 kg

Code: 13700460207530

CONTAINER LOAD

20 ft: 5400 pieces

40 ft: 11700 pieces

40 ft HQ: 13800 pieces

MUSE

Collection of inspiration

M-278 BTW

M-278 BT

M-278 FB

BLUETOOTH STEREO KOPFHÖRER

FUNKTIONEN

Bluetooth-Version: V5.0