This SK750 wireless lavalier microphone system can automatically scan channels and connect them in 3 seconds. It can transmit strong signals in a stable, anti-interference, and coordinate-free manner over distances up to 50 meters. This wireless microphone operates on the 2.4GHz frequency band and provides a steady signal transmission, making it suitable for video and vlog recording, live streaming, and interviews. Both the transmitter and receiver feature built-in rechargeable batteries that can be charged using the provided USB cables and give up to 5 hours of operation once completely charged.