1. Introduction
Thank you for choosing the XIAOKOA U80-B Wireless Microphone Headset System. This system is designed to provide clear and stable audio transmission for various applications, including teaching, fitness instruction, tour guiding, and public speaking. Featuring advanced UHF digital wireless technology, multiple wearing styles, and a user-friendly LED display, the U80-B offers reliable performance and convenience. Please read this manual thoroughly to ensure proper setup and operation of your device.
2. Product Overview
2.1 Components
The XIAOKOA U80-B system includes the following components:
- Wireless Transmitter
- Wireless Receiver
- Headset Microphone
- Handheld Microphone (optional, can be connected to transmitter)
- 1/4 inch to 1/8 inch Adapter
- Dual USB Charging Cable

Figure 2.1: Overview of the XIAOKOA U80-B Wireless Microphone System components.
2.2 Key Features
- Advanced UHF Digital Wireless Technology: Offers 15 selectable channels and a transmission range of up to 165 feet (50 meters) in open areas for stable, interference-free performance.
- Versatile Wearing Styles: Supports headset, handheld, and lapel (via handheld mic) configurations to suit various needs. The headset microphone features a 360° rotatable design.
- Clear LED Display: Built-in screen on the transmitter displays frequency, volume, and battery status for real-time monitoring.
- Long-Lasting Rechargeable Battery: Equipped with an 800mAh battery providing 8-10 hours of continuous use on a 3-hour USB-C charge.
- Plug-and-Play Convenience: Automatic connection between receiver and transmitter upon power-on. Features a secure nut-connection interface for stability.
3. Setup Instructions
3.1 Charging the Devices
Before initial use, fully charge both the wireless transmitter and receiver. Use the provided dual USB charging cable to connect both units to a USB power source (e.g., computer USB port, USB wall adapter). A full charge typically takes approximately 3 hours.

Figure 3.1: Charging the transmitter and receiver using the dual USB cable.
3.2 Connecting the Microphone to the Transmitter
Select your preferred microphone (headset or handheld) and securely plug its 3.5mm jack into the microphone input port on the wireless transmitter. Ensure the nut-connection interface is tightened for a stable connection.

Figure 3.2: Securely connecting the microphone to the transmitter.
3.3 Connecting the Receiver to an Audio Device
Plug the wireless receiver directly into the 1/4 inch (6.35mm) microphone input jack of your amplifier, PA system, or speaker. If your audio device has a 1/8 inch (3.5mm) microphone input, use the included 1/4 inch to 1/8 inch adapter.
Important Note: The receiver is not compatible with Bluetooth speakers, computers, or mobile phones. It must be plugged into a dedicated "MIC" port.

Figure 3.3: Connecting the receiver to a compatible audio device.
3.4 Powering On and Automatic Pairing
Turn on both the wireless transmitter and the wireless receiver. The units will automatically pair with each other. The LED display on the transmitter will show the current channel, battery status, and signal strength once connected.
4. Operating Instructions
4.1 Wearing Styles
The XIAOKOA U80-B offers flexibility with three primary wearing options:
- Headset Microphone: Ideal for hands-free operation, providing consistent audio quality. The boom can be rotated 360° for optimal positioning near your mouth.
- Handheld Microphone: By connecting the included handheld microphone to the transmitter, you can use it as a traditional handheld mic.
- Neckband Microphone: The headset can also be worn as a neckband style for a less obtrusive look while maintaining hands-free use.

Figure 4.1: Three versatile wearing styles.

Figure 4.2: The headset microphone features a 360° rotatable design.
4.2 LED Display and Controls
The transmitter features an LED display that provides essential information:
- Battery Status: Indicates the remaining battery life.
- Signal Strength: Shows the quality of the wireless connection.
- Channel Number (U01-U15): Displays the currently selected UHF channel.
- Volume Level (V00-V10): Shows the current output volume.
Use the control ring on the transmitter to adjust the volume and change channels. Press the power switch briefly to cycle through volume and frequency adjustment modes.

Figure 4.3: Transmitter LED display details.
4.3 Transmission Range
The system offers a stable transmission range of up to 165 feet (50 meters) in open, unobstructed environments. Performance may vary depending on obstacles, interference, and environmental conditions.

Figure 4.4: Long-distance transmission capability.
5. Maintenance
5.1 Cleaning
Wipe the transmitter, receiver, and microphones with a soft, dry cloth. Do not use liquid cleaners or abrasive materials, as these can damage the device.
5.2 Storage
When not in use, store the system in a cool, dry place away from direct sunlight and extreme temperatures. Ensure the devices are turned off to preserve battery life.
5.3 Battery Care
To prolong battery life, avoid completely draining the battery frequently. Charge the devices regularly, even if not in constant use, to maintain battery health.
6. Troubleshooting
- No Sound Output:
- Ensure both the transmitter and receiver are powered on.
- Check that the microphone is securely connected to the transmitter.
- Verify the receiver is correctly plugged into the "MIC" input of your audio device.
- Increase the volume on both the transmitter and your audio device.
- Check the battery levels of both units.
- Interference or Poor Sound Quality:
- Try changing the channel on the transmitter to avoid interference from other wireless devices.
- Ensure there are no major obstructions between the transmitter and receiver.
- Reduce the distance between the transmitter and receiver.
- Avoid using the system near strong electromagnetic fields.
- Device Not Pairing:
- Turn off both the transmitter and receiver, then turn them back on to re-initiate the automatic pairing process.
- Ensure both units are fully charged.
- Short Battery Life:
- Ensure the devices are fully charged before use (3 hours for a full charge).
- Battery performance can be affected by extreme temperatures.
7. Specifications
| Model Name | U80-B |
| Brand | XIAOKOA |
| Microphone Form Factor | Headset |
| Connectivity Technology | UHF |
| Number of Channels | 15 |
| Transmission Range | Up to 165 feet (50 meters) in open areas |
| Power Source | Battery Powered (1 Lithium Polymer battery included) |
| Battery Capacity | 800mAh |
| Working Time | 8-10 hours |
| Charge Time | 3 hours (USB-C) |
| Connector Type | 3.5 mm Jack, 6.35 mm Jack |
| Compatible Devices | Amplifier, PA System, Speaker |
| Material | Plastic |
| Item Weight | 10.2 ounces |
| Polar Pattern | Omnidirectional |
8. Warranty and Support
This product comes with a standard manufacturer's warranty. For specific warranty details, please refer to the product packaging or contact XIAOKOA customer support. If you encounter any issues or have questions regarding the operation or maintenance of your XIAOKOA U80-B Wireless Microphone Headset System, please contact our customer service team for assistance.
You can typically find contact information on the product packaging, the official XIAOKOA website, or through your purchase platform.