Bietrun UHF Dual Wireless Microphone System WXM31-2 User Manual

Introduction

Welcome to the Bietrun UHF Dual Wireless Microphone System WXM31-2. This manual provides detailed instructions for setting up, operating, maintaining, and troubleshooting your new wireless microphone system. Please read this manual thoroughly before use to ensure optimal performance and longevity of your device.

Package Contents

2 x Bietrun WXM31-2 Wireless Microphones
1 x Rechargeable Receiver (1/4'' Plug)
1 x 6.35mm to 3.5mm Adapter
1 x USB Charging Cable (for both microphones and receiver)
2 x Anti-roll Rings (color may vary)
1 x User Manual

Bietrun WXM31-2 Wireless Microphone System components — An image displaying all components included in the Bietrun WXM31-2 package: two wireless microphones, one rechargeable receiver, one 6.35mm to 3.5mm adapter, one USB charging cable, and two anti-roll rings.

Setup Instructions

1. Powering the Microphones

Each microphone requires 2 AA batteries (not included).

Unscrew the bottom part of the microphone.
Insert 2 AA batteries, ensuring correct polarity.
Screw the bottom part back on.

Microphone battery installation — A close-up image showing the bottom part of the microphone unscrewed, revealing the battery compartment for two AA batteries.

2. Charging the Receiver

The receiver has a built-in 1200mAh rechargeable lithium-ion battery.

Connect the USB charging cable to the receiver's DC 5V input port.
Connect the other end of the USB cable to a power source (e.g., USB adapter, computer USB port).
The charging indicator light will illuminate. A full charge takes approximately 3-4 hours and provides up to 7+ hours of working time.

Receiver charging process — An image showing the compact receiver connected to a USB charging cable, with a red indicator light visible, signifying charging.

3. Connecting the Receiver to an Audio Device

The receiver features a 1/4'' (6.35mm) plug.

Insert the receiver directly into the 1/4'' MIC input jack of your audio device (e.g., speaker, singing machine, audio amplifier, PA system, mixer, audio interface).
If your audio device has a 3.5mm MIC input, use the included 6.35mm to 3.5mm adapter.

Note: Ensure the receiver is plugged into a MIC input, not an AUX input. Not compatible with computers, smartphones, or tablets directly without an appropriate audio interface.

Receiver compatibility with various audio devices — A diagram illustrating the receiver's compatibility with various audio devices like amplifiers, mixers, karaoke machines, and PA systems, highlighting that it must be connected to a MIC input.

An official Bietrun video demonstrating the plug-and-play setup of the WXM31 wireless microphone system, showing the receiver being plugged into a karaoke machine and microphones being turned on.

An official Bietrun video showcasing the automatic connection feature of the wireless microphone system, from plugging in the receiver to turning on the microphones.

Operating Instructions

1. Powering On/Off

To power on each microphone, long-press the power button located on the microphone body. The display will light up.

To power off, long-press the power button again.

To power on the receiver, press the power button on the receiver. The indicator lights for channels A and B will illuminate.

2. Automatic Connection

The microphone and receiver are designed to connect automatically upon powering on. The receiver will display which microphone (A or B) is active.

Microphone and receiver power on steps — A visual guide showing Step 1: Turn on the Microphone (displaying CH01), and Step 2: Turn on the Receiver (showing PWR CHR, DC 5V, and POWER buttons with A and B indicators).

3. Adjusting Channels

Each microphone has 15 adjustable frequency channels. If you experience interference or are using multiple microphone sets, you can change the channel.

Short-press the "CH" (Channel switch) button on the microphone body to cycle through available channels (CH01-CH15).
Ensure each microphone in use is set to a different channel to avoid interference.

Microphone display and channel switch — A detailed diagram of the microphone showing the battery indicator, signal indicator, channel display (CH05), long-press for on/off, short-press for volume, and the channel switch key.

4. Adjusting Volume

Short-press the power/volume button on the microphone to adjust the volume level.

5. Optimal Microphone Usage

For the best sound quality and to ensure your voice is loud and clear, speak with your mouth close to the top of the microphone.

Microphone dynamic core features — An exploded view diagram of the microphone's 25mm dynamic core, highlighting features like cardioid pickup, high sensitivity, high fidelity, and noise filtering for clearer sound.

Maintenance

Keep the microphones and receiver dry and clean.
Avoid exposing the devices to extreme temperatures or direct sunlight.
When not in use for extended periods, remove AA batteries from the microphones to prevent leakage.
Recharge the receiver regularly to maintain battery health.
Use a soft, dry cloth to clean the exterior of the microphones and receiver.

Troubleshooting

Problem	Possible Cause	Solution
No Sound	Microphone/Receiver not powered on.	Ensure both microphones and receiver are powered on.
No Sound	Low microphone batteries.	Replace AA batteries in microphones.
No Sound	Low receiver battery.	Recharge the receiver.
No Sound	Receiver not plugged into MIC input.	Plug receiver into the correct 1/4'' or 3.5mm MIC input.
Interference/Poor Sound Quality	Microphones on the same channel or external interference.	Change the channel on the microphone by short-pressing the "CH" button. Ensure each microphone uses a unique channel.
Interference/Poor Sound Quality	Distance too far from receiver.	Reduce the distance between the microphone and receiver (max 98 ft in open areas). Ensure line of sight.
Interference/Poor Sound Quality	Obstructions between microphone and receiver.	Remove any large obstructions between the microphone and receiver.

Wireless microphone range diagram — A diagram illustrating the 98ft wireless transmission range of the microphones, showing the receiver and two microphones with signal waves.

Specifications

Model: WXM31-2
Brand: Bietrun
Connectivity Technology: UHF
Wireless Range: Up to 98 feet (open place)
Microphone Type: Dynamic
Polar Pattern: Unidirectional
Audio Sensitivity: 95 dB
Frequency Response: 50Hz - 16KHz
Impedance: 600 ohms
Adjustable Channels: 15 per microphone
Microphone Power: 2 x AA batteries (not included)
Receiver Battery: Built-in 1200mAh rechargeable lithium-ion battery
Receiver Working Time: Up to 7+ hours
Receiver Charging Time: 3-4 hours
Connector Type: 1/4'' (6.35mm) plug, includes 3.5mm adapter
Compatible Devices: Speakers, Singing machines, Audio amplifiers, PA systems, Voice amplifiers, Mixers, Audio Interfaces, etc. (with MIC input)
Material: Metal (microphones)
Item Dimensions: 1.35 x 1.2 x 9.4 inches (microphone)

Warranty and Support

This Bietrun WXM31-2 Wireless Microphone System comes with a 1-year warranty from the date of purchase.

For technical support, warranty claims, or any questions regarding your product, please contact Bietrun customer service through the retailer's platform or visit the official Bietrun website. Please have your model number (WXM31-2) and proof of purchase ready.

Additional Information

The display on each microphone shows battery power and signal strength in real-time, preventing unexpected power loss during use.

The all-metal design of the handheld microphones ensures durability and a comfortable grip.

Microphone display showing battery and channel — A close-up of the microphone's display, showing real-time battery level and channel information, which helps monitor usage.

Bietrun WXM31-2