Wireless Transmission System: The ES-386 is a wireless transmission conversion system that converts your wired microphone into a wireless microphone while maintaining maximum audio quality. Using UHF technology, strong anti-interference ability. The frequency band used is 540.0MHz-590MHz , the wireless transmission range reaches 98 feet, and the use is not bound by the cable, free to move. Device compatibility: The receiver of the ES-386 can switch operating voltages (0V,3V,48V), adapt dynamic microphones (0V) and capacitive microphones (3V,48V). There is also a volume adjustment function (VOL1-VOL7), which allows you to control the volume remotely. Rechargeable battery: The device has a built-in rechargeable battery that can last for about 5 hours after a full charge, and you can charge your device at any time via a USB cable without worrying about excessive use time. Excellent compatibility: The device is free of XLR to 6.35 adapters, the transmitter is compatible with musical instrument microphones, capacitive microphones, dynamic microphones, etc., and the receiver is compatible with various audio interfaces such as PA SYSTEM, power amplifier, mixer, and voice processor. Widely used in recording, stage, interview, performance, conference, family karaoke and other occasions. Colour:Black Material:plastic Package Contents: 1 x Microphone Transmitter 1 x Microphone Receiver 1 x Male to 6.35mm plug 1 x Female to 6.35mm plug 1 x Female to 3.5mm plug Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.