Introduction
This manual provides comprehensive instructions for the setup, operation, and maintenance of your Bietrun 4-Channel Wireless Microphones System. This UHF metal dynamic cordless microphone system is designed for various applications including karaoke, singing, church events, and family theater, offering automatic connection and a stable range of up to 295 feet.
Package Contents
Please verify that all items listed below are included in your package:
- 4 x Rechargeable Handheld Microphones (A, B, C, D)
- 1 x Wireless Receiver Unit
- 2 x USB Charging Cables
- 1 x UL Certified DC Adapter
- 4 x Microphone Antennas
- 4 x Windproof Sponge Covers (Mic Covers)
- 1 x 6.35mm to 6.35mm Audio Cable
- 1 x User Manual (this document)
Figure 1: All components included in the Bietrun 4-Channel Wireless Microphone System package.
Product Overview
Receiver Unit
The receiver unit features a sturdy metal case with a clear LCD display for each of the four channels. It includes individual volume controls for precise vocal balancing and utilizes Surface Acoustic Wave (SAW) signal technology for stable performance.
Figure 2: Front view of the receiver unit, showing LCD displays for each channel and volume controls.
Handheld Microphones
Each microphone is equipped with a built-in 1200mAh rechargeable lithium-ion battery, providing up to 7 hours of work time. They feature a dynamic unidirectional microphone core for clear sound, a cool LED light ring (green for working, red for charging), and a clear white LED display showing battery power, signal range, frequency, and channel.
Figure 3: Detailed view of a rechargeable handheld microphone, highlighting its features and charging port.
Setup
- Unpack and Inspect: Carefully remove all components from the packaging and inspect them for any damage. Refer to the "Package Contents" section to ensure all items are present.
- Connect Antennas: Screw the four microphone antennas into their respective ports on the rear of the receiver unit. Ensure they are securely tightened.
- Power On Receiver: Connect the UL Certified DC Adapter to the DC 12V input on the receiver and plug it into a power outlet. Press the Power button on the receiver to turn it on.
- Charge Microphones: Before first use, fully charge the handheld microphones using the provided USB charging cables. The LED ring on the microphone will turn red while charging and green when fully charged.
- Connect to Audio System:
- Using 6.35mm Cable (Included): Connect one end of the 6.35mm to 6.35mm cable to the "MIX OUTPUT" port on the receiver. Connect the other end to the 6.35mm Mic input port on your Partybox, Speaker, Amplifiers, PA system, or Karaoke Machine.
- Using XLR Cables (Not Included): For individual channel control, connect XLR cables from the "BAL.A", "BAL.B", "BAL.C", "BAL.D" outputs on the receiver to corresponding XLR inputs on your Audio Mixer.
- Power On Microphones: Long press the "PWR·VOL" button on each microphone to turn it on. The microphone will automatically connect to the receiver. The LED ring will glow green, and the LCD display will show its channel and frequency.
Figure 4: Rear view of the receiver unit, showing various output ports and antenna connections.
Figure 5: The system offers a stable wireless signal range of up to 295 feet in open areas.
Operating Instructions
Adjusting Microphone Volume
Volume can be adjusted both on the receiver unit and directly on each microphone.
- Receiver Volume Control: Use the individual volume knobs (VOL-A, VOL-B, VOL-C, VOL-D) on the front of the receiver to adjust the output level for each microphone channel independently.
- Microphone Volume Control: Press the "PWR·VOL" button on the microphone to cycle through volume levels (U01 to U05). The selected volume level will be displayed on the microphone's LCD screen and reflected on the receiver.
Changing Microphone Frequency
If you experience interference, you can change the operating frequency of a microphone.
- Locate the "CH" button on the bottom of the microphone (near the charging port).
- Press the "CH" button. The microphone's display will show a new frequency, and the receiver will automatically synchronize to this new frequency.
- The system supports 5 adjustable frequencies per mic within the lawful signal bands (500 - 599Mhz).
Using Bluetooth Functionality
The receiver unit also functions as a Bluetooth receiver, allowing you to stream audio wirelessly.
- Ensure the small Bluetooth antenna is connected to the "BT ANT" port on the rear of the receiver.
- On your Bluetooth-enabled device (e.g., smartphone, tablet), search for available Bluetooth devices.
- Select the Bietrun receiver from the list to pair. Once paired, you can play music through the receiver while simultaneously using the microphones.
Maintenance
Charging Microphones
The microphones are equipped with rechargeable batteries. When the battery indicator on the microphone's LCD or receiver's display shows low power, recharge them using the provided dual charging cable. A full charge takes approximately 3-4 hours and provides up to 7+ hours of continuous use.
Cleaning and Storage
To ensure longevity and hygiene:
- Regularly wipe down the microphone bodies and receiver with a soft, dry cloth.
- For the microphone heads, use the provided windproof sponge covers. These can be removed and cleaned separately to maintain hygiene, especially when multiple users handle the microphones.
- Store the system in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from microphone. | Microphone not turned on or battery low. Receiver not powered on. Incorrect cable connection. Volume too low. | Long press "PWR·VOL" button on mic. Charge microphone. Ensure receiver is plugged in and powered on. Check all audio cable connections (6.35mm or XLR). Increase volume on both microphone and receiver. |
| Interference or poor sound quality. | Frequency conflict with other devices. Microphone too far from receiver. Obstructions between mic and receiver. | Press "CH" button on microphone to change frequency. Reduce distance between microphone and receiver (max 295ft). Ensure clear line of sight. |
| Microphone not connecting to receiver. | Microphone or receiver not powered on. Out of range. Frequency mismatch (unlikely with auto-connect). | Ensure both are powered on. Bring microphone closer to receiver. Try changing microphone frequency. |
| Bluetooth not connecting. | Bluetooth antenna not connected. Device not in pairing mode. Out of Bluetooth range. | Ensure Bluetooth antenna is securely attached to the receiver. Put your device in Bluetooth pairing mode. Bring your device closer to the receiver. |
Specifications
- Model Name: WXM26
- Brand: Bietrun
- Microphone Form Factor: Handheld audio wireless microphone
- Power Source: Rechargeable (4 Lithium Polymer batteries included)
- Material: Aluminum, Iron
- Audio Sensitivity: 95 dB
- Signal-to-Noise Ratio: 95 dB
- Noise Level: 95 dB
- Frequency Range: 50Hz - 18kHz
- Frequency Response: 18 KHz
- Number of Channels: 20 (with 5 adjustable frequencies per mic)
- Connectivity Technology: XLR, 6.35 mm Jack
- Polar Pattern: Unidirectional
- Wireless Range: Up to 295 feet (90 meters) in open areas)
- Battery Life: Up to 7+ hours (microphones)
- Charging Time: 3-4 hours (microphones)
- Item Weight: 3 Kilograms (6.6 pounds)
Warranty and Support
For any product-related inquiries, technical assistance, or warranty information, please contact Bietrun customer support. Refer to the product packaging or the official Bietrun website for the most current contact details.
We recommend registering your product on the Bietrun website to receive updates and support.
