Warranty: Please read the user manual before using our product. If you encounter any problems during use, please contact us. We provide 1 year warranty and 24 hours consulting service. It is recommended to charge the lavalier microphone and upgrade the phone to the latest version before first use. Long Range Transmission & Long Battery Life: Phone microphone for recording with a transmission range of up to 65 feet (20 meters), no messy cables, can be moved at any time without hindrance. The receiver is powered by your device (or be charged at the same time) and the transmitter with built-in rechargeable battery can work up to 4-6 hours. Noise reduction & automatic synchronization: Our 360°omnidirectional wireless mic has a built-in professional-grade intelligent noise reduction chip, which will automatically detect and cut off various noises during recording, with strong anti-interference ability, even in noisy environments. Clear recording. Real-time auto-sync technology greatly reduces the time for post-editing videos, providing you with a better viewing experience. No App/Bluetooth Required: Just connect the Type-C receiver to the audio device, short press to turn on the microphone and it will automatically connect. The mini microphone can be clipped to the collar for hands-free audio and video recording. For two-person use scenarios, the wireless lavalier microphone has two microphones. Only supports devices with USB C & OTG: The wireless microphones is designed for use with USB Type-C ports on smartphones, tablets and computer devices. Can be used for Youtube, Facebook, Live Streaming, Video Recording, Vlog, TikTok, etc. Note: Some Android phones need to enable OTG (oppo/vivo/sumsung/iqoo, etc.). If you don't know how to open it, please feel free to contact us.