This document describes the Bietrun WXM30 UHF Professional 8-Channels Rechargeable Wireless Microphone System.

Function Description:

The Bietrun WXM30 is a UHF professional 8-channel rechargeable wireless microphone system designed for various audio applications. It utilizes the UHF frequency band for transmission, offering a long transmission distance, strong anti-interference ability, low delay, and clear sound quality. The system is designed for ease of use and operation.

The system comprises a receiver and eight handheld microphones.

Microphone Features:

Each handheld microphone includes a display, a power/volume button, and a channel adjustment button.

Display: Shows information such as power status, signal strength, current channel (1-8), and volume level. After 5 seconds of no operation, only the battery level is displayed.
Power/Volume Button: A short press turns the microphone on, and a 2-second press turns it off. Short presses also adjust the volume level from 1 (smallest) to 5 (largest).
Channel Button: Used to adjust the microphone's channel.
Indicator Light:
- Green: Microphone is on.
- Red flash: Low power.
- Red: Charging.
- Red light off: Fully charged.
Charging Port: External DC 5V power supply charges the microphone.

Receiver Features:

The receiver unit features multiple antennas, input/output ports, and a central display.

Antennas (1, 2, 14, 15, 16, 17): Receive wireless signals from microphones 1-8. It is recommended to tighten the antenna nuts before first use. If the connection is unstable or sound is intermittent, adjusting the antenna direction can improve reception.
Power Button (1): Short press to turn on, long press to turn off.
Channel Display (2, 3, 4, 5): Displays connection information for microphones 1-8. When a microphone is not turned on, "--" flashes on its corresponding channel display.
Volume Knobs (6, 7, 8, 9, 10, 11, 12, 13): Adjust the volume for each microphone (1-8). Turning left decreases volume, turning right increases volume.
Microphone Output (18, 19, 20, 21, 22, 23, 24, 25): XLR output ports for each microphone (1-8). These ports output only the audio signal of their respective microphone.
6.35mm Audio Output (26): A 6.35mm audio output interface that provides a mixed audio signal from all microphones (1-8).
Charging Port (27): Input voltage is DC 12V. Please use the adapter provided with the product.

Connection and Usage:

Input Connection: Microphones and receiver automatically pair when turned on.
Output Connection: The system can connect to various audio amplifier devices with XLR or 6.35mm audio input interfaces, including mixers, multimedia speakers, Bluetooth speakers, power amplifiers, and lever speakers.
Note on Audio Output: XLR audio output and 6.35mm output cannot be connected to the same devices simultaneously; otherwise, the sound may not be played normally.

Troubleshooting:

Receiver won't turn on: Check power supply and adapter.
Microphones won't turn on: Check microphone charging indicator, short press power button.
No sound: Check microphone volume, amplifier/Bluetooth device power, microphone connection to receiver, receiver volume, XLR/6.35mm interface connection, and amplifier input mode.
Small sound: Adjust microphone volume (1-5, 5 is max), turn receiver knob to increase volume, turn up amplifier volume.
Intermittent sound: Shorten distance between microphone and receiver (within 30M), switch channels.
Howling or screaming: Reduce amplifier/microphone volume, avoid placing microphones too close to the speaker.

Important Technical Specifications:

Receiving frequency: U Band
Sensitivity: 2mV
Image interference ratio: >88dB
Audio output: 800mV-1.4V
Receive channel: 4 (Note: The device is described as 8-channels, this might be a typo in the manual or refer to a specific configuration).
Power consumption: 3W
Frequency stability: <0.005%
Interference frequency ratio: >90dB
Signal to noise ratio: >95dB
Working range: Standard conditions 30 to 50 m
Supply Voltage: DC 12V
Antenna: Universal antenna

Handheld Transmitter (Microphone) Specifications:

Carrier frequency: U Band
Transmit power: 10mW
Harmonic: <Main wave 40dB
Pickup: 600Ω single directivity
Antenna: Built-in
Frequency stability: <0.005%
Current consumption: <25mA
Standard: Fixed frequency
Battery: Lithium battery
Supply Voltage: DC 5V

Complex Index:

Dynamic Range: >95dB
System distortion: <1%, 1K Hertz modulation
Frequency response: 50Hz-18KHz(±3dB)

Maintenance Features:

Charging: Microphones are rechargeable via a DC 5V input. The receiver requires a DC 12V adapter.
Antenna Adjustment: Antennas can be adjusted to improve signal reception in case of unstable connections.
FCC Compliance: The device complies with FCC rules, ensuring it does not cause harmful interference and accepts interference received. Users are advised to reorient or relocate the receiving antenna, increase separation between equipment and receiver, connect equipment to a different circuit, or consult a technician if interference occurs. Any changes or modifications not explicitly approved by the manufacturer could void the user's authority to operate the equipment.
RF Exposure: The device meets general RF exposure requirements and can be used in portable exposure conditions without restriction.

Packing List:

8X Microphone (1, 2, 3, 4, 5, 6, 7, 8)
1X Receiver
4X Microphone Antenna
1X 6.35mm to 6.35mm cable
2X Charging cable
1X Adapter
1X Manual

Bietrun WXM30 - Page 6

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