Rechargeable and LED display The microphone receiver can be charged. No need to set! No need to buy batteries! The microphone can be used for about 30 hours, and the battery of the receiver can be used for 15 hours. With USB charging port. The microphone display can display the battery power in real time, without worrying about sudden failure to work. Easy to use plug and play, without pairing. No need to buy batteries! The receiver box adopts 6.35mm audio head, which can be directly inserted into any audio (especially suitable for karaoke, speech, conference, performance, indoor or outdoor. It is designed for outdoor karaoke speakers, PA speaker system, power amplifier, etc.), without separate connection of output lines. (Not applicable to Bluetooth speaker/PC/mobile phone) 2000mah battery&durable