1. Introduction
Thank you for choosing the Monster MQO22 OWS Bluetooth 5.4 Headphones. These open-ear wireless earbuds are designed to provide high-fidelity sound, comfortable wear, and advanced features for music, gaming, and calls. Please read this manual carefully before use to ensure proper operation and to maximize your listening experience.
For a detailed user manual in PDF format, please refer to the official document: Monster MQO22 User Manual (PDF)
2. Package Contents
Ensure all items are present in the box:
- 2 x Bluetooth Earphones (Left and Right)
- 1 x Charging Case
- 1 x Charging Cable (Type-C)
- 1 x User Manual
Video: Product overview and unboxing of the Monster MQO22 headphones.
3. Setup and Charging
3.1 Initial Charging
Before first use, fully charge the headphones and the charging case.
- Place the earbuds into the charging case.
- Connect the charging case to a power source using the provided Type-C charging cable.
- The indicator lights on the case and earbuds will show charging status.
- A full charge for the charging case takes approximately 2 hours.
3.2 Wearing the Headphones
The Monster MQO22 features an open-ear, ear-hook design for comfortable and secure wear.
- Gently place the ear-hook over your ear, ensuring the speaker rests comfortably near your ear canal without entering it.
- Adjust the ear-hook for a snug and stable fit. The titanium alloy memory wire allows for flexibility and retains its shape.

Image: Demonstrating the comfortable open-ear wearing style.

Image: Detail of the skin-friendly liquid silicone and titanium alloy memory wire for flexible fit.
3.3 Bluetooth Pairing
- Open the charging case; the earbuds will automatically power on and enter pairing mode (indicated by flashing lights).
- On your device (smartphone, tablet, computer), enable Bluetooth.
- Search for "Monster MQO22" in the list of available Bluetooth devices.
- Select "Monster MQO22" to connect. Once connected, a voice prompt will confirm, and the indicator lights will turn off or show a steady light.
- The headphones will automatically reconnect to the last paired device when taken out of the case, if Bluetooth is enabled on the device.
4. Operating Instructions
4.1 Touch Key Operations
The Monster MQO22 headphones feature intuitive touch controls on each earbud (MFB - Multi-Function Button).
| Action | Left Earbud (MFB) | Right Earbud (MFB) |
|---|---|---|
| Volume Up | Click | N/A |
| Volume Down | N/A | Click |
| Previous Song | Triple-click | N/A |
| Next Song | N/A | Triple-click |
| Answer Call | Double-click | Double-click |
| Hang Up Call | Double-click | Double-click |
| Reject Call | Long press for 2 seconds | Long press for 2 seconds |
| Voice Assistant | Long press for 2 seconds | Long press for 2 seconds |
| Pause | Double-click | Double-click |
| Play | Double-click | Double-click |

Image: Visual guide for touch key operations.
4.2 Music and Gaming Modes
The headphones support both Music Mode and Game Mode for optimized audio experiences.
- Music Mode: Provides in-depth analysis of sound quality and HIFI sound.
- Game Mode: Accurately listens to sound and position, offering low latency for an immersive gaming experience.

Image: Audio and video synchronization for gaming and music.
4.3 High-Definition Voice Calls
The MQO22 headphones are equipped with technology to improve wind noise immunity by 96%, ensuring clear calls even in noisy environments.

Image: High-definition voice calls with strong Bluetooth 5.4 signal.
5. Maintenance
5.1 Cleaning
- Wipe the earbuds and charging case with a soft, dry, lint-free cloth.
- Do not use harsh chemicals, cleaning solvents, or strong detergents.
- Avoid getting moisture in any openings.
5.2 Storage
- When not in use, store the headphones in their charging case to protect them and keep them charged.
- Store in a cool, dry place, away from extreme temperatures and direct sunlight.
5.3 Water Resistance
The Monster MQO22 headphones are designed to be waterproof, making them suitable for sports and outdoor activities. However, they are not intended for swimming or submersion in water. Ensure the charging port is dry before charging.
6. Troubleshooting
6.1 No Sound or Disconnection
- Ensure the headphones are charged and powered on.
- Check that Bluetooth is enabled on your device and the headphones are connected.
- Move the headphones closer to your device and away from potential interference sources.
- Try unpairing and re-pairing the headphones with your device.
6.2 Charging Issues
- Verify the charging cable is securely connected to both the case and the power source.
- Ensure the charging case and earbuds are clean and free of debris that might obstruct charging contacts.
- Try using a different charging cable or power adapter.
6.3 Resetting to Factory Settings
If you experience persistent issues, you may need to reset the headphones to their factory settings. Refer to the detailed PDF user manual for specific instructions on performing a factory reset, as this process can vary.
7. Specifications
| Feature | Specification |
|---|---|
| Product Name | True wireless Bluetooth headset |
| Model | Monster MQO22 |
| Bluetooth Version | V5.4 |
| Speaker Unit (Driver Diameter) | 14.2mm |
| Wearing Method | Ear-hook style (Open-ear) |
| Bluetooth Transmission Distance | Up to 10 meters / 33 feet |
| Headset Battery Capacity | 50mAh |
| Charging Bin Battery Capacity | 300mAh |
| Playing Time (Earbuds) | About 7 hours |
| Total Battery Life (with charging box) | About 20 hours |
| Charging Time (Charging Case) | About 2 hours |
| Material | Plastic |
| Frequency Response Range | 20 - 20000Hz |
| Sensitivity | 106dB |
| Impedance Range | up to 32 Ω |
| Max Output | 10mW |
| Total Harmonic Distortion | 1% |
| Features | With microphone, Active Noise Cancelling, Sound Isolating, Volume Control, Control Button |
| Compatibility | Android, iOS, Windows (Mobile phones, tablet PCs, computers) |

Image: Product Parameters table.
8. User Tips
- Optimal Fit: Experiment with the ear-hook adjustment to find the most secure and comfortable fit for extended listening sessions.
- Battery Management: For maximum battery life, always place the earbuds back into the charging case when not in use.
- Gaming Performance: Switch to Game Mode for critical gaming sessions to benefit from reduced audio latency.
- Call Clarity: Position the microphone correctly during calls to take full advantage of the ENC noise cancellation for clear communication.
- Connectivity: If experiencing intermittent connection, ensure your device's Bluetooth is not connected to other devices simultaneously.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the seller or refer to the official Monster product website. Keep your proof of purchase for warranty claims.





