Xiaomi HiFi 9D Stereo Bluetooth 5.3 Bone Conduction Earphones User Manual

1. Introduction

Thank you for choosing the Xiaomi HiFi 9D Stereo Bluetooth 5.3 Bone Conduction Earphones. These truly wireless earbuds are designed to provide a comfortable, open-ear audio experience, perfect for sports and daily use. Featuring advanced Bluetooth 5.3 connectivity, waterproof design, smart touch controls, and an integrated microphone for clear calls, these earphones offer high-quality sound and convenience. 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 x Pair of Bluetooth Earphones
• 1 x Charging Case
• 1 x USB Type-C Charging Cable
• 1 x Instruction Manual

3. Specifications

4. Setup

4.1 Charging the Earphones and Case

1. Place the earphones into the charging case. Ensure they are correctly seated.
2. Connect the charging case to a power source using the provided USB Type-C cable.
3. The LED display on the charging case will show the battery level of the case and individual earbuds. A full charge is indicated when the display shows 99 or 100.

It is recommended to fully charge the earphones and charging case before first use.

4.2 Pairing with a Device

1. Ensure the earphones are charged.
2. Open the charging case. The earphones will automatically enter pairing mode (indicated by a flashing light on the earbuds, if present).
3. On your smartphone, tablet, or laptop, enable Bluetooth.
4. Search for available Bluetooth devices and select "Xiaomi Earphones" (or similar name) from the list.
5. Once connected, you will hear a confirmation tone, and the indicator light on the earbuds will stop flashing.

The earphones support dual-channel synchronous transmission, allowing for stable and fast connection. They can be used independently (single ear mode) or together (dual ear mode) with continuous switching.

4.3 Wearing the Earphones

These earphones feature an ergonomic, lightweight, and semi-open design for a comfortable and secure fit. They are designed to sit comfortably without entering the ear canal, allowing for situational awareness while listening to audio. Adjust them to ensure a snug fit, especially during physical activities.

5. Operating Instructions

The earphones feature smart touch controls on each earbud for easy management of audio and calls.

5.1 Music Playback

• Play/Pause: Tap once on either earbud.
• Next Track: Double-tap the right earbud.
• Previous Track: Double-tap the left earbud.
• Volume Up: Triple-tap the right earbud.
• Volume Down: Triple-tap the left earbud.

5.2 Call Management

• Answer/End Call: Tap once on either earbud.
• Reject Call: Press and hold either earbud for 2 seconds.

5.3 Voice Assistant

• Activate Voice Assistant (Siri/Google Assistant): Press and hold either earbud for 3 seconds.

5.4 Power On/Off

• Power On: Open the charging case, or press and hold the touch panel on both earbuds for 3 seconds if they are out of the case and off.
• Power Off: Place the earphones back into the charging case and close the lid, or press and hold the touch panel on both earbuds for 5 seconds.

6. Maintenance

6.1 Cleaning

• Regularly clean the earbuds and charging case with a soft, dry, lint-free cloth.
• Do not use harsh chemicals, cleaning solvents, or strong detergents.
• Clean the charging contacts on both the earbuds and the case with a dry cotton swab to ensure proper charging.

6.2 Waterproofing

The earphones are waterproof, designed to withstand sweat and light rain, making them suitable for sports and outdoor activities. However, they are not designed for submersion in water. Avoid using them while swimming or showering, and do not expose them to pressurized water or high-velocity water, such as from a faucet or shower.

6.3 Storage

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

7. Troubleshooting

7.1 Earphones Not Pairing

• Ensure both earphones are charged.
• Turn off Bluetooth on your device and turn it back on.
• Forget the device in your phone's Bluetooth settings and try pairing again.
• Place the earphones back in the charging case, close the lid, wait a few seconds, then open it again to re-enter pairing mode.

7.2 No Sound or Intermittent Sound

• Check the volume level on both your device and the earphones.
• Ensure the earphones are within the maximum wireless range (10-20 meters) of your device.
• Move away from sources of strong electromagnetic interference.
• Try reconnecting the earphones to your device.

7.3 Earphones Not Charging

• Ensure the charging cable is securely connected to both the case and the power source.
• Check if the charging contacts on the earbuds and inside the case are clean and free of debris.
• Try using a different USB Type-C cable and power adapter.
• Ensure the charging case itself has sufficient power.

8. User Tips

• Open-Ear Comfort: The bone conduction design allows you to hear your surroundings while enjoying audio, which is great for outdoor activities like running or cycling where situational awareness is important.
• Secure Fit for Sports: The ergonomic design ensures the earbuds stay firmly in place during workouts.
• Battery Monitoring: Utilize the LED display on the charging case to keep track of the battery levels of both the case and individual earbuds, so you're never caught off guard.
• Waterproof, Not Submersible: While waterproof for sweat and rain, avoid submerging the earphones in water (e.g., swimming pools) to prevent damage.
• Low Latency Gaming: These earphones are designed for low latency, providing an immersive gaming experience without noticeable audio delay.

9. Warranty & Support

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