Product Overview
The SENXIN K11 Wireless Lavalier Microphone system is designed to provide high-quality audio capture for Android Type C devices. It features automatic noise reduction, a 360° omnidirectional pickup pattern, and stable 2.4GHz wireless transmission, making it ideal for various applications such as video recording, vlogging, and live streaming. This compact and portable microphone system offers a convenient and reliable solution for enhancing your audio experience.
1. Setup Guide
1.1 What's in the Box
- Microphone Transmitter
- Type-C Receiver
- Type-C Charging Cable
- Instruction Manual (this document)
1.2 Quick Connection Steps
The K11 wireless microphone system is designed for straightforward plug-and-play operation, eliminating the need for additional applications or Bluetooth pairing. Follow these steps to get started:
- Charge the Transmitter: Before initial use, ensure the microphone transmitter is fully charged using the provided Type-C charging cable.
- Power On the Transmitter: Press and hold the power button on the microphone transmitter. The indicator light will illuminate.
- Connect the Receiver: Plug the Type-C receiver directly into the Type-C port of your Android phone or PC.
- Automatic Pairing: The transmitter and receiver will automatically pair. A successful connection is indicated when the microphone's indicator light remains steadily on (not flashing).
- Begin Recording: Once paired, you can proceed to record audio or video using your device's native camera or recording applications.

Image: Quick and Easy Connection Steps
2. Operating Instructions
2.1 Audio Capture and Noise Reduction
The K11 microphone features a 360° omnidirectional pickup, allowing for comprehensive audio capture from all directions. It integrates automatic noise reduction technology, which actively filters out environmental sounds to ensure clear and crisp audio, even in noisy surroundings. This is achieved through a built-in smart chip and a high-density sponge wind screen.

Image: Omnidirectional Pickup and Intelligent Noise Reduction Features

Image: Visual Representation of Noise Reduction Effectiveness
2.2 Wireless Transmission
The microphone operates using 2.4GHz transmission technology, providing a stable connection with low latency and strong resistance to interference. This allows for clear audio transmission up to a distance of 65 feet (approximately 20 meters), offering freedom of movement during recording.

Image: Wireless Transmission Range and Real-Time Recording
2.3 Mute Function
The K11 microphone transmitter is equipped with a mute function. To activate or deactivate the mute feature, refer to the specific button on the microphone unit. This allows for temporary audio cutoff without disconnecting the device.
2.4 Battery Life and Charging
The microphone transmitter offers approximately 4-5 hours of continuous operation on a full charge. The receiver unit is powered directly by your connected phone or PC. A convenient feature allows you to charge your phone through the receiver's Type-C port while the microphone system is in use, preventing your phone's battery from draining during long recording sessions.

Image: Charging Phone via Receiver Port
2.5 Low Battery Reminder
When the microphone transmitter's battery level is low, the blue indicator light on the unit will begin to flash slowly. This serves as a reminder to charge the device promptly to avoid interruption during use.
3. Wide Applications
The SENXIN K11 Wireless Lavalier Microphone is versatile and suitable for a variety of audio recording needs, including:
- Video Recording
- Live Streaming
- Interviews
- Vlogging

Image: Examples of K11 Microphone Applications
4. Maintenance
To ensure the longevity and optimal performance of your SENXIN K11 Wireless Lavalier Microphone, please adhere to the following maintenance guidelines:
- Cleaning: Use a soft, dry, and lint-free cloth to gently clean the microphone and receiver units. Avoid using liquid cleaners, solvents, or abrasive materials, as these can damage the device.
- Storage: When not in use, store the microphone system in a cool, dry environment, away from direct sunlight, high humidity, and extreme temperatures. Keeping it in its original packaging or a protective pouch is recommended.
- Handling: Handle the microphone and receiver with care. Avoid dropping them or subjecting them to strong impacts, which can cause internal damage.
- Charging: Always use the provided Type-C charging cable for the transmitter. Avoid overcharging the battery, and disconnect the charger once the unit is fully charged.
5. Troubleshooting
If you encounter any issues while using your SENXIN K11 Wireless Lavalier Microphone, please consult the following common troubleshooting steps:
- Microphone Not Connecting or Pairing:
- Ensure both the microphone transmitter and the Type-C receiver are powered on.
- Verify that the receiver is securely and fully plugged into your device's Type-C port.
- Check if the microphone's indicator light is solid (not flashing), which signifies a successful connection. If it's flashing, it's still searching for a connection.
- Try restarting both the microphone transmitter and your recording device (phone/PC).
- Poor Audio Quality or Excessive Noise:
- Ensure the microphone is positioned correctly and securely clipped, ideally close to the sound source.
- Check for any physical obstructions between the transmitter and receiver that might interfere with the 2.4GHz wireless signal.
- Move away from strong electromagnetic interference sources (e.g., Wi-Fi routers, other wireless devices).
- Confirm the microphone transmitter is adequately charged. Low battery can sometimes affect performance.
- Short Battery Life:
- Ensure the microphone transmitter is fully charged before each use.
- Battery performance can naturally degrade over time with repeated charging cycles.
- Operating in extremely cold environments can also temporarily reduce battery life.
- No Sound Output:
- Check your recording device's audio input settings to confirm that the external microphone is selected as the input source.
- Verify that the microphone is not accidentally muted.
- Ensure the receiver is properly connected and recognized by your device. Some devices may require a quick restart after connecting an external accessory.
6. Product Specifications
| Feature | Detail |
|---|---|
| Brand | SENXIN |
| Model Name | K11 |
| Connectivity Technology | 2.4GHz, USB Type-C |
| Connector Type | USB Type-C |
| Microphone Form Factor | Mini, Clip-On |
| Polar Pattern | Omnidirectional |
| Special Features | Automatic Noise Reduction, Battery Indicator Light, Clip, Mute Function |
| Compatible Devices | Laptop, Smartphone (Android Type C) |
| Item Weight | 11 Grams (0.388 ounces) |
| Product Dimensions (L x W x H) | 0.91 x 0.91 x 2.52 inches |
| Power Source | Battery Powered (Transmitter) |
| Material | Plastic |
| Signal-to-Noise Ratio | 64 dB |
| Frequency Response | 20 KHz |
| Number of Channels | 2 |
| Manufacturer | shengxing |
| First Available Date | May 10, 2023 |
7. Warranty and Support
For detailed warranty information, technical support, or any product-related inquiries, please refer to the warranty card or documentation included with your SENXIN K11 Wireless Lavalier Microphone. Alternatively, you may visit the official SENXIN website or contact their customer service department directly for assistance.
8. Product Demonstration Video
Watch the official product video below to see the SENXIN K11 microphone's noise reduction capabilities and transmission distance in action. This video provides a practical demonstration of the microphone's performance in various environments.
Video: K11 Microphone Noise Reduction and Transmission Distance Test. This video demonstrates the microphone's ability to filter out background noise and maintain clear audio over various distances, showcasing its effectiveness in different settings.





