Introduction
This manual provides instructions for the MUSE M-278 BTB Bluetooth Over-Ear Headphones. It covers setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your device. The M-278 BTB headphones offer wireless Bluetooth connectivity, hands-free calling, and an integrated battery providing up to 30 hours of music playback.

Image showing the MUSE M-278 BTB Bluetooth Over-Ear Headphones. The headphones feature a blue-grey finish with padded earcups and an adjustable headband.
Setup
1. Initial Charging
Before first use, fully charge the headphones. Connect the included USB cable to the headphone's charging port and a compatible USB power source. The charging indicator light will show the charging status and turn off or change color once fully charged. The integrated battery (370 mAh/3.7 V) provides up to 30 hours of music playback on a full charge.
2. Powering On/Off
- To Power On: Press and hold the power button for a few seconds. The indicator light will illuminate, often with an audible prompt.
- To Power Off: Press and hold the power button again until the indicator light turns off.
3. Bluetooth Pairing
- Ensure the headphones are powered on and in pairing mode. The indicator light will typically flash rapidly (e.g., blue and red) to indicate pairing mode.
- On your Bluetooth-enabled device (smartphone, tablet, computer), go to the Bluetooth settings.
- Search for available devices. Select 'MUSE M-278 BTB' from the list.
- Once connected, the indicator light on the headphones will usually stop flashing and remain solid blue, and you may hear a confirmation tone.
4. Aux-in Connection (Wired Mode)
For wired audio playback, connect one end of the provided Aux-in cable to the headphone's Aux-in port and the other end to the audio output jack of your device. The headphones will automatically switch to wired mode.
Operating Instructions
Music Playback
- Play/Pause: Press the multi-function button once.
- Volume Up: Press the '+' button.
- Volume Down: Press the '-' button.
- Next Track: Press and hold the '+' button (or double-press, depending on model specifics).
- Previous Track: Press and hold the '-' button (or double-press, depending on model specifics).
Call Management (Hands-Free)
When connected via Bluetooth, the headphones support hands-free calling.
- Answer Call: Press the multi-function button once when a call comes in.
- End Call: Press the multi-function button once during a call.
- Reject Call: Press and hold the multi-function button for approximately 2 seconds.
- Voice Control: The headphones support voice control. Activate your device's voice assistant by pressing the dedicated voice control button (if available) or by pressing and holding the multi-function button.
Maintenance
Cleaning
Clean the headphones with a soft, dry cloth. Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the surface and internal components. Avoid getting moisture into any openings.
Storage
When not in use, store the headphones in a cool, dry place, away from direct sunlight, extreme temperatures, and humidity. If possible, use the original packaging or a protective case to prevent damage.
Battery Care
To prolong the life of the integrated lithium-ion battery, avoid fully discharging it frequently. Charge the headphones regularly, even if not in constant use. Do not expose the battery to excessive heat.
Troubleshooting
- Headphones do not power on: Ensure the battery is charged. Connect the headphones to a power source and try again.
- Cannot pair with Bluetooth device:
- Ensure the headphones are in pairing mode (indicator light flashing).
- Make sure Bluetooth is enabled on your device.
- Place the headphones and your device close to each other.
- Turn off and on both the headphones and your device, then try pairing again.
- Clear the Bluetooth pairing list on your device and re-attempt pairing.
- No sound or low volume:
- Check the volume levels on both the headphones and your connected device.
- Ensure the headphones are properly connected via Bluetooth or Aux-in cable.
- If using Aux-in, ensure the cable is fully inserted into both ports.
- Poor audio quality:
- Move closer to your Bluetooth device to reduce interference.
- Avoid obstacles between the headphones and your device.
- Ensure there are no other strong wireless signals interfering.
Specifications
| Feature | Detail |
|---|---|
| Model Number | M-278 BTB |
| Brand | Muse |
| Connectivity Technology | Wireless (Bluetooth) |
| Wireless Communication Technology | Bluetooth |
| Headphone Jack | USB (for charging), Aux-in (for wired audio) |
| Ear Placement | Over-Ear (Circum-Aural) |
| Form Factor | Circum-Aural |
| Color | Blue (Note: Product title indicates Noir-Gris, but specifications list blue) |
| Material | Plastic |
| Special Features | Sweat Resistant |
| Water Resistance Level | Waterproof |
| Control Type | Voice Control |
| Recommended Uses | Music Listening, Video Games, Travel, Calls |
| Included Components | Cable (USB charging cable, Aux-in cable) |
| Battery | Integrated Lithium-ion (370 mAh/3.7 V) |
| Music Playback Time | Up to 30 hours (fully charged) |
Warranty Information
This product is covered by a standard manufacturer's warranty. Please refer to the warranty card included in the product packaging or contact Muse customer support for detailed information regarding warranty terms and conditions, including coverage period and claim procedures.
Customer Support
For further assistance, technical support, or service inquiries, please visit the official Muse website or contact their customer service department. Contact information can typically be found on the product packaging or the manufacturer's website. Please have your product model number (M-278 BTB) available when contacting support.





