Bietrun wxm29A
Bietrun Wireless XLR Transmitter Receiver User Manual
Model: wxm29A
1. Introduction
Thank you for choosing the Bietrun Wireless XLR Transmitter Receiver system. This manual provides detailed instructions for the setup, operation, maintenance, and troubleshooting of your new wireless audio equipment. Please read this manual thoroughly before using the product to ensure proper functionality and to maximize its lifespan.
2. Product Overview
The Bietrun Wireless XLR Transmitter Receiver system is designed to provide a stable and reliable wireless connection for your microphones and audio equipment, eliminating the need for cumbersome XLR cables. It features 48V phantom power support for condenser microphones, 30 adjustable channels, and a long-lasting rechargeable battery.
2.1 Components
The system typically includes the following components:
- Wireless XLR Transmitter
- Wireless XLR Receiver
- XLR to 6.35mm Adapter (Male)
- XLR to 6.35mm Adapter (Female)
- USB-C Charging Cable (2-in-1)
- User Manual

Image: The Bietrun Wireless XLR Transmitter and Receiver units, shown alongside the included 6.35mm adapters. The transmitter and receiver are compact, black devices with XLR connectors, a power button, and a display screen.
2.2 Key Features
- 48V Phantom Power: Supports both dynamic and condenser microphones.
- Extended Range: Up to 100ft (30m) indoors and 230ft (70m) outdoors.
- 30 Adjustable Channels: Minimizes interference for clear audio transmission.
- Long Battery Life: Built-in 1000mAh rechargeable batteries provide up to 8 hours of operation.
- Easy Connectivity: Compatible with various audio equipment including mixers, PA systems, and active loudspeakers.

Image: An illustration highlighting the key features of the Bietrun wireless system, including U Band Frequency, 30 Channels, Anti-interference capabilities, and Stable Connection, with the transmitter and receiver connected to a microphone and audio pedal.
3. Setup
Follow these steps to set up your Bietrun Wireless XLR system:
- Charge the Devices: Before first use, fully charge both the transmitter and receiver using the provided 2-in-1 USB-C charging cable. The display will indicate charging status. A full charge takes approximately 3 hours.
- Connect the Transmitter: Plug the XLR end of the transmitter directly into your microphone's XLR output. Ensure a secure connection.
- Connect the Receiver: Plug the XLR end of the receiver into the XLR input of your mixer, audio interface, PA system, or active loudspeaker. If your equipment uses 6.35mm (1/4 inch) inputs, use the appropriate XLR to 6.35mm adapter provided.
- Power On: Press and hold the power button on both the transmitter and receiver until their displays light up. They should automatically pair.

Image: A diagram illustrating how to connect the Bietrun wireless transmitter to a microphone and the receiver to various audio outputs like a mixer, audio amplifier, PA system, or multimedia speakers, using the included 6.35mm adapter if needed.

Image: A diagram demonstrating the audio input mode connection, showing how the Bietrun wireless system can connect to a mixer or preamplifier, and output to a mixer, audio amplifier, PA system, or multimedia speakers, utilizing the 6.35mm adapters.
4. Operation
4.1 Powering On/Off
- To Power On: Press and hold the power button on both the transmitter and receiver for approximately 2 seconds until the display illuminates.
- To Power Off: Press and hold the power button on both the transmitter and receiver for approximately 2 seconds until the display turns off.
4.2 Activating 48V Phantom Power
The Bietrun system supports 48V phantom power for condenser microphones. This feature is only available on the transmitter unit.
- Ensure the transmitter is powered on.
- Click the power button once.
- Immediately press and hold the power button again until the display shows "48V". This indicates phantom power is active.

Image: A visual guide demonstrating how to activate 48V phantom power on the Bietrun transmitter. It shows the steps: click the power button once, then press and hold until '48V' appears on the display. Various dynamic and condenser microphones are also depicted.
4.3 Changing Channels
The system offers 30 adjustable channels to prevent interference. To change the channel:
- Ensure the transmitter is powered on.
- Quickly press the transmitter's power button twice. The channel number on the display will change.
- The receiver will automatically sync to the new channel.
Note: Please ensure usage within legally designated signal bands with a US FCC ID.

Image: The Bietrun transmitter and receiver units displaying their operating frequency, with text indicating '30 Adjustable Channels' and the frequency range of 560.5MHz-589.5MHz. An FCC logo is present, signifying US FCC Standard Frequency Band compliance.
4.4 Using Multiple Sets (Channel Lock)
When using multiple Bietrun wireless XLR systems simultaneously, each set must be assigned a unique locked channel to prevent interference. The channel numbers cannot be the same for different sets operating concurrently.
- Turn off both the receiver and transmitter of the set you wish to lock.
- Turn on only the receiver.
- Keep pressing the transmitter's power button until "ID SYNC" is displayed.
- Wait for the receiver and transmitter to connect automatically. This locks the channel for that specific pair.

Image: A step-by-step guide on how to use multiple Bietrun wireless sets simultaneously by locking channels. It shows the receiver and transmitter, with the transmitter displaying 'ID SYNC' during the locking process. A warning emphasizes that each set must have a unique locked channel.
4.5 Charging the Devices
Both the transmitter and receiver have built-in 1000mAh rechargeable lithium batteries.
- Use the included 2-in-1 USB-C charging cable to charge both units simultaneously.
- A full charge takes approximately 3 hours.
- The devices provide up to 8 hours of continuous operation on a full charge.

Image: The Bietrun transmitter and receiver units are shown connected to a USB-C charging cable, illustrating the charging process. Text indicates 7.5 hours of working time, 3.5 hours of charging time, and a 1000mAh rechargeable battery capacity.
5. Troubleshooting
If you encounter issues with your Bietrun Wireless XLR system, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output | Low battery; Not paired; Incorrect channel; Incorrect input mode; Cables not connected properly. | Charge units; Power cycle both units to re-pair; Change channel; Ensure receiver is in audio mode if transmitting audio; Check all cable connections. |
| Interference or static | Other wireless devices on same frequency; Too many systems on same channel; Obstacles blocking signal. | Change channel on transmitter; Ensure each system has a unique locked channel; Reduce distance between units; Remove obstacles. |
| Short transmission range | Environmental interference; Physical obstructions; Distance too great. | Avoid areas with strong Wi-Fi or other wireless signals; Ensure clear line of sight; Operate within specified range. |
| 48V Phantom Power not activating | Incorrect activation sequence; Transmitter not fully charged. | Follow activation steps precisely (click once, then press and hold); Ensure transmitter is fully charged. |
6. Specifications
6.1 Transmitter Specifications
| Carrier Frequency: | U Band |
| Frequency Stability: | <0.002% |
| Transmit Power: | 10mW |
| Current Consumption: | <160mA |
| Harmonic: | <Main Wave 40dB |
| Standard: | Fixed Frequency |
| Battery Type: | Lithium Battery |
| Supply Voltage: | DC 5V |
| Battery Capacity: | 1000mAh |
| Antenna: | Built-in |

Image: A detailed table outlining the technical specifications of the Bietrun Wireless XLR Transmitter, including carrier frequency, stability, transmit power, current consumption, harmonic distortion, standard, battery type, supply voltage, battery capacity, and antenna type.
6.2 Receiver Specifications
| Receiving Frequency: | U Band |
| Frequency Stability: | <0.002% |
| Sensitivity: | 2mV |
| Interference Frequency Ratio: | >90dB |
| Image Interference Ratio: | >88dB |
| Signal to Noise Ratio: | >95dB |
| Audio Output: | 800mV-1.4V |
| Working Range: | Standard Condition 100-320ft |
| Receive Channel: | 1 |
| Supply Voltage: | DC 5V |
| Battery Capacity: | 1000mAh |
| Antenna: | Built-in |

Image: A detailed table outlining the technical specifications of the Bietrun Wireless XLR Receiver, including receiving frequency, stability, sensitivity, interference ratios, signal-to-noise ratio, audio output, working range, receive channel, supply voltage, battery capacity, and antenna type.
7. What's Included
The Bietrun Wireless XLR Transmitter Receiver package includes:
- 1 x Transmitter
- 1 x Receiver
- 1 x Male XLR to 6.35mm Convertor
- 1 x Female XLR to 6.35mm Convertor
- 1 x Charging Cable (USB-C, 2-in-1)
- 1 x User Manual

Image: A visual representation of all items included in the Bietrun Wireless XLR System package: the transmitter, receiver, male and female XLR to 6.35mm converters, charging cable, and user manual.
8. Safety Information
Please observe the following safety precautions to prevent damage to the device or injury to yourself:
- Do not expose the device to water, moisture, or extreme temperatures.
- Do not attempt to disassemble or modify the device. Repairs should only be performed by qualified personnel.
- Use only the provided charging cable and a compatible power adapter (DC 5V).
- Keep the device away from strong electromagnetic fields.
- Dispose of batteries responsibly according to local regulations.
9. Warranty and Support
Bietrun products are designed for reliability and performance. For any questions, technical support, or warranty inquiries, please contact Bietrun customer service through the retailer where you purchased the product or visit the official Bietrun website for contact information.
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