1. Introduction
Thank you for choosing the M-VAVE WP-12 2.4G Wireless Earphone Monitor System. This system provides high-quality, lossless audio transmission for various applications, including live performances, studio monitoring, and personal practice. With its 2.4GHz wireless frequency band, rechargeable batteries, and support for multiple receivers, the WP-12 offers flexibility and clear sound reproduction. Please read this manual thoroughly before operating the device to ensure proper use and optimal performance.
2. Safety Information
- Do not expose the device to water, moisture, or extreme temperatures.
- Use only the specified charging method (5V1A charger via USB Type-C) to prevent damage or fire.
- Avoid disassembling or modifying the device, as this may void the warranty and pose safety risks.
- Keep the device away from strong electromagnetic fields.
- Ensure proper ventilation when charging or operating for extended periods.
- Do not use the system at excessively high volumes for prolonged periods, as this may cause hearing damage.
3. Package Contents
Please check the package to ensure all items are present:
- 1 x Wireless Ear Return Transmitter
- 4 x Wireless Ear Return Receivers
- 1 x USB Charging Cable
- 4 x Audio Cables
- 1 x User Manual

4. Product Overview
The M-VAVE WP-12 system consists of a main transmitter unit and four individual receiver units.
4.1 Transmitter Unit
The transmitter serves as the central hub, receiving audio input and broadcasting it wirelessly to the receivers. It features charging docks for the receivers, a power button, and status indicators.


4.2 Receiver Unit
Each receiver is a compact unit designed to be connected to your earphones. It includes a volume control, a pairing button, and status indicators.

5. Setup Instructions
5.1 Charging the Devices
- Connect the USB charging cable to the transmitter's USB Type-C port.
- Connect the other end of the USB cable to a 5V1A USB power adapter (not included).
- Place the receivers into the charging docks on the transmitter. The indicator lights on both the transmitter and receivers will show charging status.
- Charge until the indicator lights show full charge. The transmitter has a battery life of up to 24 hours, and each receiver up to 6 hours.
5.2 Connecting the Transmitter to an Audio Source
- Using one of the supplied audio cables, connect the 'IN' port on the back of the transmitter to the audio output of your sound source (e.g., mixer, audio interface, instrument).
5.3 Pairing Receivers with the Transmitter
The receivers and transmitter should be pre-paired from the factory. If re-pairing is needed:
- Ensure both the transmitter and receivers are powered on.
- Press and hold the 'PAIR' button on the receiver until its indicator light flashes rapidly.
- Press the 'PAIR' button on the transmitter (if available, otherwise power cycle the transmitter).
- Once successfully paired, the indicator lights on both devices will become solid.
5.4 Connecting Earphones to Receivers
- Plug your wired earphones into the 3.5mm jack on each receiver.
6. Operating Instructions
6.1 Power On/Off
- **Transmitter:** Press and hold the power button on the transmitter until the indicator lights illuminate/extinguish.
- **Receivers:** Press and hold the power button on each receiver until its indicator light illuminates/extinguishes.
6.2 Volume Adjustment
- Each receiver has dedicated 'VOL+' and 'VOL-' buttons to adjust the individual earphone volume.
6.3 Mute Function
- **Transmitter:** The transmitter supports a one-button mute function. Refer to the transmitter's specific button for this feature.
- **Receivers:** Each receiver can also be muted. Consult the receiver's controls for its mute functionality.
6.4 Working Modes
The system provides four working modes to suit different audio needs:
- Left Channel: Receives only the left channel audio.
- Right Channel: Receives only the right channel audio.
- Stereo: Receives both left and right channel audio for a stereo experience.
- Mute: Silences the audio output.
Switching between modes is typically done via a button on the receiver. Refer to the receiver's specific controls for mode selection.
6.5 Multiple Receiver Connection
The M-VAVE WP-12 system supports one transmitter connecting to multiple receivers simultaneously, allowing up to four individuals to monitor the same audio source wirelessly.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the devices. Do not use liquid cleaners or solvents.
- Storage: Store the system in a cool, dry place away from direct sunlight when not in use.
- Battery Care: To prolong battery life, avoid fully discharging the batteries frequently. If storing for extended periods, charge the batteries to about 50% every few months.
- Cable Management: Avoid sharp bends or kinks in the audio and charging cables to prevent damage.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from receivers | Devices not powered on; Not paired; Audio cable disconnected; Volume too low; Mute activated. | Ensure all devices are on; Re-pair transmitter and receivers; Check audio cable connection; Increase receiver volume; Deactivate mute. |
| Poor audio quality/Interference | Out of range; Obstructions; Interference from other 2.4GHz devices. | Move closer to the transmitter; Remove obstructions; Move away from other wireless devices. |
| Short battery life | Batteries not fully charged; Old batteries. | Ensure full charge before use; Consider battery replacement if performance degrades significantly over time. |
| Receivers not charging | Transmitter not powered/connected to power; Receivers not properly seated in dock. | Ensure transmitter is powered; Re-seat receivers firmly in their docks. |
9. Specifications
| Feature | Specification |
|---|---|
| Sampling Rate | 24bit/48KHz lossless digital transmission |
| Wireless Frequency Band | 2.4GHz |
| Effective Distance | Up to 30 meters (outdoor) |
| Power Requirements | Built-in lithium batteries, rechargeable via USB Type-C (5V1A charger recommended) |
| Frequency Response | 20~20K Hz, +1dB/-3dB |
| Transmitter Battery Capacity | 1800mAh (Model: 803060) |
| Receiver Battery Capacity | 200mAh (Model: 402030) |
| Battery Nominal Voltage | 3.7V |
| Transmitter Dimensions (L x W x H) | 95.04mm x 39.7mm x 38.12mm |
| Receiver Dimensions (L x W) | 31.1mm x 41.5mm |
| Transmitter Weight | 75g |
| Receiver Weight (each) | 15g |
| Material | Plastic |
| Batteries Included | Yes |
10. User Tips
- Multi-User Monitoring: The system is designed to support one transmitter broadcasting to multiple receivers simultaneously. This means you can indeed use the four included receivers for four different individuals to monitor the same audio source.
- Optimal Placement: For the best wireless performance, try to keep the transmitter in a clear line of sight with the receivers and minimize physical obstructions.
- Charging Habits: While the transmitter has a long battery life, it's good practice to charge all units after each extended use to ensure they are ready for your next session.
11. Warranty and Support
M-VAVE products are designed for reliability and performance. For any technical support or warranty inquiries, please refer to the contact information provided with your purchase or visit the official M-VAVE website. Keep your proof of purchase for warranty claims.





