M91 Wireless Earphone User Manual

1. Introduction

Welcome to the M91 Wireless Earphone user manual. These earbuds are designed to provide a superior audio experience with advanced features such as 40dB noise cancelling, real-time language translation, and stable Bluetooth 5.4 connectivity. Their ergonomic design ensures comfort for extended wear, making them ideal for travel, business, and daily use.

M91 TWS Earbuds in charging case, highlighting Wireless 5.4 chip, Shocking sound, Type-C Flash charging, Open wearing, and AI HD Call.

2. Package Contents

Please check the box for the following items:

• 2 x Language Translation Earbuds
• 1 x Charging Case
• 1 x Charging Cable
• 1 x Instruction Manual (this document)

3. Specifications

Charging case dimensions.

Noise level chart for comfortable listening.

4. Setup Guide

4.1 Initial Charging

1. Place both earbuds into the charging case.
2. Connect the charging cable (Type-C) to the charging case and a power source.
3. Allow the earbuds and case to fully charge before first use. The LED indicator on the case will show charging status.

4.2 Pairing with Your Device

1. Ensure the earbuds are charged and inside the charging case.
2. Open the charging case lid. The earbuds will automatically enter pairing mode.
3. On your mobile phone, tablet, or laptop, enable Bluetooth.
4. Search for "M91" in the list of available Bluetooth devices.
5. Select "M91" to connect. Once connected, you will hear an audio prompt, and the earbuds will be ready for use.

Intelligent connection and device compatibility.

5. Operation

5.1 Wearing the Earbuds

The M91 earbuds feature an ergonomic design crafted from high-performance nickel-titanium memory alloy for a snug and comfortable fit. Gently insert the earbuds into your ears, adjusting them for optimal comfort and sound.

3D ergonomic design for a secure fit during activity.

5.2 Touch Controls

The M91 earbuds feature intelligent touch controls for easy management of audio and calls:

• Previous Track: Long press the left earbud.
• Next Track: Long press the right earbud.
• Pause/Play: Double-click either earbud.
• Volume Control: Long press either earbud (specific action for +/- volume may vary, refer to app for customization).
• Answer/Hang Up Call: Double click either earbud.
• Activate Voice Assistant: Three strikes (triple tap) either earbud.

Intelligent touch control gestures.

5.3 Language Translation

The M91 earbuds support real-time translation for 144 languages and 70 dialects. To utilize this feature:

1. Ensure your earbuds are connected to your smartphone.
2. Download and open the dedicated translation application (if required, check product packaging or official website for app details).
3. Follow the in-app instructions to select languages and initiate real-time translation.

The earbuds feature directional transmission technology to protect privacy during conversations by automatically adjusting the sound beam's propagation angle.

Directional transmission for privacy.

5.4 Audio Experience

Experience crystal clear audio with HD sound, panoramic stereo sound field (ACS 360° Air Conduction Stereo), and enhanced bass. The earbuds offer 40dB noise cancelling for an immersive listening experience, whether for music, calls, or translations.

Panoramic sound stereo field.

Enhanced sound quality with bass boost.

6. Maintenance

6.1 Cleaning

• Regularly clean the earbuds and charging case with a soft, dry, lint-free cloth.
• Do not use abrasive cleaners, alcohol, or chemical solvents.
• Avoid getting moisture in any openings.

6.2 Storage

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

7. Troubleshooting

7.1 Earbuds Not Pairing

• Ensure both earbuds are fully charged.
• Place earbuds back in the case, close the lid, wait a few seconds, then open the lid again to re-enter pairing mode.
• Turn off and on Bluetooth on your device.
• Forget "M91" from your device's Bluetooth settings and try pairing again.

7.2 No Sound or Low Volume

• Check the volume level on both your connected device and the earbuds.
• Ensure earbuds are properly seated in your ears.
• Clean any debris from the earbud speakers.
• Reconnect the earbuds to your device.

7.3 Translation Not Working

• Ensure the earbuds are properly connected to your device and the translation app is open.
• Check your internet connection, as most real-time translation features require online access.
• Verify that the correct source and target languages are selected in the app.
• Update the translation application to the latest version.

8. User Tips

• Translation Subscriptions: While the earbuds offer extensive language translation, some advanced features or offline language packages within the companion application may require in-app purchases or subscriptions. Check the app details for more information.
• Comfortable Listening: The M91 earbuds are designed for comfortable listening within the 0-60dB range, helping to protect your hearing during long periods of use.
• Versatile Use: These earbuds are suitable for various scenarios, including daily wear, business occasions, and during physical activity due to their secure and lightweight fit.

M91 Earbuds in various usage scenarios.

9. Warranty and Support

For warranty information and technical support, please refer to the documentation provided with your purchase or contact the retailer/manufacturer directly. Keep your proof of purchase for any warranty claims.