ASiNG WM01 2.4GHz Wireless Audio Transmission Electronic Pickup Microphone, Transmission Distance: 50m, WM011. Wireless music pickup set without cable limitation. 2. About 6 hours long time using. 3. Can charge with computer with USB port. 4. Mini size easy taking. 5. Sweat proof design. 6. Please note: This 2. 4G wireless microphone does not have an audio player. It needs to be used with audio, power amplifier or amplifier, and cannot be amplified alone. Specification: General Weight 54g Package Weight One Package Weight 0. 30kgs 0. 65lb One Package Size