: Built-in bluetooth wireless microphone noise Cancellation, noise reduction chip can accurately filter various noises and has a strong anti-interference ability. Lavalier microphone can effectively identify and restore the original sound in a noisy environment, gives best clear timbre. & : Please read the user manual and charge the mini mic before using it for the first time. Please feel free to contact us for further assistance, we provide 24 months warranty and 24 hours consult service. The package includes Wireless Microphones*2, Type-C to USB Adaptor, 4 in 1 Receiver, Extra Anti-spray Sponge*2, Mini Store Case, Charging Cable.. & : This professional wireless lavalier microphone uses 2.4GHz transmission technology to provide stable audio signals within a range of up to 65 feet. The microphone transmitter and receiver have built-in rechargeable batteries, and after about 2 hours of charging, the microphone transmitter and receiver can be used for up to 6 hours. : Wireless mic are easier to set up. Plug and play, no adapters, Bluetooth or apps required, just plug the receiver (Lightning/TYPE-C/3.5mm port) into your device. Then turn on the portable microphone and the two parts will pair automatically. (Note: Bluetooth wireless microphone, if the matching is unsuccessful, dont worry, just turn off the device and try again.)-- : Upgraded mini microphone with USB-C/3.5mm TRS/USB plug, compatible with android smartphones, iphone(including iPhone 15), iPad, laptops, personal computers, camera etc. The receiver can be connected to two microphones at the same time, or of course to a separate microphone.