M57 Bone Conduction Earhooks Wireless Earphones User Manual

1. Introduction

Thank you for choosing the M57 Bone Conduction Earhooks Wireless Earphones. These earphones are designed to provide a unique audio experience by transmitting sound through your cheekbones, allowing you to enjoy music while remaining aware of your surroundings. Featuring OWS (Open Wearable Stereo) noise cancellation technology and Bluetooth 5.4 connectivity, the M57 offers clear sound, enhanced bass, and all-day comfort with its adjustable ear hooks. This manual will guide you through the setup, operation, and maintenance of your new earphones.

2. Package Contents

Please check the package for the following items:

• 1 Set M57 Bone Conduction Earhooks (Left and Right Earphones)
• 1 Charging Case
• 1 USB Type-C Charging Cable (not explicitly mentioned but standard for Type-C connectors)
• User Manual (this document)

3. Product Overview

The M57 earphones feature an ergonomic ear-hook design with a 90° adjustable rotation for a secure and comfortable fit. The accompanying charging case includes a digital display to indicate battery status.

Figure 1: M57 Bone Conduction Earhooks in various colors within their charging cases.

Figure 2: White M57 Earhooks in charging case, highlighting the digital battery display.

Figure 3: Close-up of a white M57 earhook, demonstrating the adjustable design.

Figure 4: Charging case dimensions (approximately 9.8cm x 5.5cm x 3.2cm).

4. Setup

4.1 Charging the Earphones and Case

1. Place the M57 earphones into their charging case. Ensure they are correctly seated in the charging contacts.
2. Connect the USB Type-C charging cable to the charging port on the case and plug the other end into a compatible USB power source (e.g., wall adapter, computer USB port).
3. The digital display on the charging case will show the current battery level. Allow the case and earphones to fully charge before first use.
4. Once fully charged, disconnect the charging cable.

4.2 Bluetooth Pairing

1. Ensure the earphones are charged and removed from the charging case. They should automatically enter pairing mode (indicated by a flashing LED on the earphones, if present).
2. On your device (smartphone, tablet, computer), enable Bluetooth.
3. Search for available Bluetooth devices. You should see "M57" or a similar name appear in the list.
4. Select "M57" to connect. Once connected, the earphones will indicate successful pairing (e.g., a voice prompt or solid LED light).
5. The earphones will automatically reconnect to the last paired device when removed from the case and within range.

5. Operating Instructions

5.1 Wearing the Earphones

1. Identify the Left (L) and Right (R) earphones.
2. Gently place the earhook over your ear, positioning the bone conduction transducer in front of your ear, resting on your cheekbone.
3. Adjust the 90° rotatable earhook to achieve a comfortable and secure fit. The elastic ear hooks are designed to adapt to various ear shapes.

5.2 Basic Controls

While specific button functions are not detailed, most wireless earphones utilize touch controls for the following:

• Power On/Off: Earphones typically power on automatically when removed from the case and power off when placed back in the case. Manual power on/off may involve a long press on the touch area.
• Play/Pause: Single tap on either earphone.
• Next Track: Double tap on the right earphone.
• Previous Track: Double tap on the left earphone.
• Answer/End Call: Single tap on either earphone during an incoming call.
• Reject Call: Long press on either earphone during an incoming call.
• Volume Control: The product specifications indicate volume control is available. This is typically managed via your connected device or specific touch gestures (e.g., tap and hold, or multiple taps). Refer to your device's audio settings for precise control.
• Voice Assistant: Triple tap on either earphone to activate your device's voice assistant (Siri, Google Assistant, etc.).

5.3 Making Calls

The M57 earphones are equipped with a microphone for hands-free calling. Once paired with your phone, you can answer, end, or reject calls using the touch controls as described above.

6. Maintenance

6.1 Cleaning

• Wipe the earphones and charging case with a soft, dry, lint-free cloth.
• Do not use abrasive cleaners, solvents, or spray cleaners.
• Keep the charging contacts on the earphones and inside the case clean and dry.

6.2 Storage

• When not in use, store the earphones in their charging case to protect them and keep them charged.
• Store in a cool, dry place, away from extreme temperatures and direct sunlight.

6.3 Battery Care

• To prolong battery life, avoid fully discharging the earphones and charging case frequently.
• Charge the device regularly, even if not used for extended periods.

7. Troubleshooting

• Earphones not pairing:
  • Ensure earphones are charged and out of the case.
  • Turn off Bluetooth on your device and turn it back on.
  • Forget/delete "M57" from your device's Bluetooth list and try pairing again.
  • Try pairing with a different device to rule out device-specific issues.
• No sound:
  • Check the volume level on both your earphones and the connected device.
  • Ensure the earphones are properly connected to your device.
  • Make sure the audio output on your device is set to the M57 earphones.
• Charging issues:
  • Verify the charging cable is securely connected to both the case and the power source.
  • Ensure the charging contacts on the earphones and in the case are clean and free of debris.
  • Try a different USB Type-C cable and power adapter.
• Poor sound quality/intermittent connection:
  • Ensure you are within the 10-meter Bluetooth transmission range.
  • Minimize obstacles between the earphones and your device.
  • Avoid strong electromagnetic interference.

8. Specifications

9. User Tips

• Optimal Fit: Experiment with the 90° adjustable ear hooks to find the most comfortable and secure fit for your ears. A good fit ensures optimal sound transmission.
• Situational Awareness: Remember that bone conduction technology allows you to hear your surroundings. This is a safety feature, especially for outdoor activities.
• Regular Charging: Keep your charging case topped up to ensure your earphones are always ready for use. The digital display helps monitor the battery level.
• Clean Contacts: Periodically clean the charging contacts on both the earphones and inside the case to prevent charging issues.

10. Warranty and Support

For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.