Introduction
This manual provides detailed instructions for the Bietrun WXM29 Wireless XLR Transmitter Receiver. This system converts wired XLR microphones into wireless units, offering enhanced mobility and versatility for various audio applications. It operates on the UHF frequency band, features multiple adjustable channels, and includes Bluetooth connectivity for audio playback.

Image: Bietrun WXM29 Wireless XLR Transmitter Receiver with included 1/4 inch adapters.
Key Features
- Stable Transmission: UHF frequency band with an indoor range of up to 100ft/50m and outdoor range up to 230ft/70m.
- 30 Adjustable Channels: Allows simultaneous use of multiple systems without interference.
- Rechargeable Batteries: Built-in 1000mAh lithium batteries provide 8 hours of operation on a 3-hour charge.
- Bluetooth Connectivity: Receiver can connect to smartphones, smart TVs, tablets, or laptops for music playback through speakers.
- Universal Compatibility: Equipped with XLR plugs and a 6.35mm adapter for dynamic/condenser mics, audio mixers, PA systems, and more.
Setup
What's in the Box
- 1 x Bietrun Wireless XLR Transmitter
- 1 x Bietrun Wireless XLR Receiver
- 1 x 2-in-1 USB Charging Cable
- 2 x XLR to 6.35mm Adapters
Charging the Devices
Both the transmitter and receiver feature built-in 1000mAh rechargeable lithium batteries. A full charge takes approximately 3 hours and provides up to 8 hours of operation.
- Connect the included 2-in-1 USB charging cable to both the transmitter and receiver.
- Plug the USB-A end of the cable into a standard USB power adapter (not included).
- The charging indicator light will illuminate during charging and turn off when fully charged.

Image: The Bietrun WXM29 Transmitter and Receiver connected to the dual Type-C charging cable.
Initial Connection & Pairing
- Plug the Wireless XLR Transmitter into your dynamic or condenser microphone's XLR output.
- Plug the Wireless XLR Receiver into your audio mixer, PA system, active loudspeaker, or audio interface's XLR input. If your device uses a 6.35mm input, use the provided XLR to 6.35mm adapter.
- Power on both the transmitter and receiver by pressing and holding their respective power buttons.
- The devices should automatically pair. If not, refer to the 'Channel Adjustment' section for manual pairing.

Image: Diagram showing the transmitter connected to a microphone and the receiver connected to various audio devices.
Operating Instructions
Power On/Off
To power on or off either the transmitter or receiver, press and hold the power button located on the device.
Channel Adjustment
The system supports 30 adjustable channels to prevent interference, especially when using multiple wireless systems simultaneously.
- To change the channel (when powered on), simply press the transmitter's power button twice.
- The channel will cycle through the available frequencies. Ensure both the transmitter and receiver are on the same channel for proper operation.

Image: The Bietrun WXM29 Transmitter and Receiver showing the 30 adjustable channels and FCC compliance.
Using Multiple Sets (Channel Lock)
When using multiple Bietrun WXM29 systems simultaneously, each set must be assigned a unique locked channel to avoid interference.
- Turn off both the receiver and transmitter for the set you wish to configure.
- Turn on only the receiver.
- Keep pressing the receiver's power button until "ID SYNC" is displayed on the screen.
- Now, turn on the transmitter. The receiver and transmitter will connect automatically on a unique locked channel.
- Repeat this process for each additional set, ensuring each operates on a distinct locked channel.

Image: Visual guide for the Channel Lock procedure when setting up multiple wireless XLR systems.
Bluetooth Functionality (Receiver)
The receiver includes Bluetooth functionality, allowing it to play music from your smart devices through a connected speaker or audio system.
- Ensure the receiver is powered on and connected to your speaker or audio system.
- On your smartphone, smart TV, tablet, or laptop, enable Bluetooth and search for available devices.
- Select "Bietrun" from the list of devices to pair.
- Once paired, switch the receiver to audio mode (refer to device display for mode selection).
- You can now play music from your device through the connected audio system.

Image: The Bietrun WXM29 Receiver connected via Bluetooth to a smartphone, playing music through an audio interface.
Transmission Range
The system provides a reliable transmission range:
- Indoor: Up to 100ft (50m)
- Outdoor: Up to 230ft (70m)
Optimal range is achieved in environments with minimal obstructions and electromagnetic interference.

Image: Diagram illustrating the indoor (100ft) and outdoor (230ft) working range of the Bietrun WXM29 system.
Official Product Video
Video: Official Bietrun product video demonstrating the Wireless XLR Transmitter Receiver.
Maintenance
Battery Care
- Fully charge the devices before first use.
- Avoid completely draining the battery frequently to prolong its lifespan.
- Store the devices in a cool, dry place when not in use for extended periods.
Cleaning
- Use a soft, dry cloth to clean the exterior of the transmitter and receiver.
- Avoid using liquid cleaners or solvents, as they may damage the device.
Troubleshooting
- No Sound:
- Ensure both transmitter and receiver are powered on.
- Verify that both devices are paired and on the same channel.
- Check all cable connections to the microphone and audio system.
- Confirm the microphone is functioning correctly.
- Interference/Poor Signal:
- Change the channel on both the transmitter and receiver (refer to 'Channel Adjustment').
- Ensure there are no major obstructions (e.g., thick walls) between the transmitter and receiver.
- Move away from other wireless devices or strong electromagnetic fields.
- Bluetooth Pairing Issues:
- Ensure the receiver is in audio mode for Bluetooth functionality.
- Make sure your smart device's Bluetooth is enabled and searching for devices.
- Try restarting both the receiver and your smart device.
Specifications
| Feature | Detail |
|---|---|
| Model Name | wxm29 |
| Brand | Bietrun |
| Connectivity Technology | 1/4 inch Plug, Bluetooth, UHF, XLR Plug |
| Connector Type | 6.35 mm Jack, XLR |
| Signal Format | UHF |
| Number of Channels | 30 |
| Transmission Range (Indoor) | Up to 100ft (50m) |
| Transmission Range (Outdoor) | Up to 230ft (70m) |
| Battery Capacity | 1000mAh (Lithium Polymer) |
| Operating Time | Up to 8 hours |
| Charging Time | Approx. 3 hours |
| Audio Sensitivity | 95 Decibels |
| Signal-to-Noise Ratio | 95 dB |
| Item Weight | 9.2 ounces (260 Grams) |
| Material | Plastic (ABS Body) |
| Compatible Devices | Audio Interface, Audio Mixer, XLR microphone, with XLR input speaker |
Warranty & Support
For warranty information or technical support, please refer to the official Bietrun website or contact their customer service directly. Keep your purchase receipt for any warranty claims.





