1. Introduction
Thank you for choosing the Open XG99 Headphones. These innovative open-ear earbuds are designed to provide a comfortable and immersive audio experience with advanced features like directional sound technology, 14mm dynamic drivers, and 360-degree surround sound. Equipped with Bluetooth 5.4, they offer a stable and fast connection for all your audio needs.
Package Contents
- 1 Pair of Open XG99 Headphones
- 1 Charging Case
- 1 Instruction Manual
- 1 Data Cable (Type-C)
- 1 Lanyard

Image 1.1: The Open XG99 Headphones, charging case, and accessories.
2. Setup
2.1 Charging the Headphones and Case
Before first use, fully charge both the headphones and the charging case. The charging case has a 300mAh battery capacity, and each earbud has a 40mAh capacity. A full charge takes approximately 1 hour via the Type-C charging port.
- Place the Open XG99 Headphones into their respective slots in the charging case.
- Connect the provided Type-C data cable to the charging port on the case and plug the other end into a USB power source (e.g., wall adapter, computer USB port).
- The indicator lights on the charging case will show the charging status. Once fully charged, the lights will indicate completion or turn off.

Image 2.1: The charging case indicating battery level and Type-C charging port.
2.2 Bluetooth Pairing
The Open XG99 Headphones utilize Bluetooth 5.4 for a stable and efficient wireless connection with an effective range of up to 10 meters.
- Ensure the headphones are charged and removed from the charging case. They will automatically enter pairing mode.
- On your device (smartphone, tablet, laptop), go to the Bluetooth settings.
- Search for available devices and select "Open XG99" from the list.
- Once connected, you will hear an audio prompt, and the indicator light on the headphones will change.
- The headphones will automatically reconnect to the last paired device when taken out of the case, if Bluetooth is enabled on the device.

Image 2.2: Highlighting Bluetooth 5.4 connectivity and HD digital display.
3. Operating the Headphones
3.1 Wearing the Headphones
The Open XG99 Headphones feature an upgraded hanging ear design for comfort, allowing your ears to breathe freely during extended use.
- Gently place the ear hook over the top of your ear, ensuring the speaker unit is positioned comfortably near your ear canal without entering it.
- Adjust for a secure and comfortable fit.

Image 3.1: Demonstrating the comfortable hanging ear design.
3.2 Basic Functions
The Open XG99 Headphones are designed for intuitive control. Specific touch or button controls may vary slightly, but common functions include:
- Power On/Off: Automatically power on when removed from the case and off when placed back.
- Play/Pause: Single tap on either earbud.
- Next Track: Double tap on the right earbud.
- Previous Track: Double tap on the left earbud.
- Volume Control: Triple tap on the right earbud for volume up, triple tap on the left earbud for volume down.
- Answer/End Call: Single tap during an incoming call.
- Reject Call: Press and hold for 2 seconds during an incoming call.
- Activate Voice Assistant: Press and hold for 2 seconds (when not on a call).
3.3 Audio Features
- Directional Sound Technology: Delivers rich, dynamic audio directly to your ears while minimizing sound leakage.
- 14mm Large Dynamic Drivers: Ensures robust bass and crystal-clear treble for an enhanced listening experience.
- 360° Surround Sound: Creates an immersive, three-dimensional audio environment, ideal for music and movies.

Image 3.2: Depiction of the 14mm PU composite diaphragm speaker unit.
4. Maintenance
Proper maintenance ensures the longevity and optimal performance of your Open XG99 Headphones.
- Cleaning: Use a soft, dry, lint-free cloth to wipe the headphones and charging case. Do not use abrasive cleaners, alcohol, or chemical solvents.
- Water Resistance: The headphones are waterproof. However, avoid prolonged submersion in water and ensure they are dry before placing them back in the charging case.
- Storage: When not in use, store the headphones in their charging case to protect them from dust and damage. Store in a cool, dry place away from extreme temperatures.
- Battery Care: To preserve battery life, avoid fully discharging the headphones and case frequently. Charge them regularly, even if not used for extended periods.
5. Troubleshooting
If you encounter issues with your Open XG99 Headphones, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Headphones do not power on. | Low battery. | Charge the headphones and charging case fully. |
| Cannot pair with device. | Bluetooth is off on device; headphones not in pairing mode; too far from device; interference. | Ensure Bluetooth is enabled on your device. Place headphones in case, then remove to re-enter pairing mode. Move closer to your device. Turn off other Bluetooth devices nearby. |
| No sound or low volume. | Volume too low on device/headphones; not properly connected; earbud obstruction. | Increase volume on both your device and the headphones. Reconnect the headphones. Check for any debris obstructing the speaker. |
| Intermittent connection or sound drops. | Out of range; interference; low battery. | Move closer to your device. Avoid areas with strong Wi-Fi or other wireless signals. Ensure headphones are sufficiently charged. |
| "Authorization code invalid" error (as reported by some users). | Possible software glitch or pairing issue. | Try unpairing and re-pairing the headphones. If the issue persists, try resetting your device's Bluetooth settings or contacting customer support. |
6. Specifications
| Feature | Detail |
|---|---|
| Model Name | HLBETMETH-BLUE |
| Connectivity Technology | Bluetooth |
| Wireless Communication Technology | Bluetooth |
| Bluetooth Version | 5.4 |
| Bluetooth Range | 10 Meters |
| Earbud Battery Capacity | 40mAh (Per Earbud) |
| Charging Case Battery Capacity | 300mAh |
| Charging Time | Approximately 1 Hour |
| Charging Port | Type-C |
| Battery Life (Headphones) | 6 Hours |
| Total Playtime (with case) | Up to 90 Hours |
| Audio Driver Type | Dynamic Driver (14mm) |
| Water Resistance Level | Waterproof |
| Item Weight | 50 Grams / 1.76 ounces |
| Color | Blue (for this variant) |
| Manufacturer | Generic |
7. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact the seller directly. Keep your proof of purchase for any warranty claims.
For further assistance, you may also visit the product page on Amazon: Amazon Product Page





