Product Name: A8 Wireless Guitar Transceiver Shell: ABS environmentally friendly material Transmission frequency: UHF Transmission delay: less than 4ms Voltage: 5V Color: Black Frequency broadband: 20Hz-20kHz Battery capacity: 300mAh Charging time: 1.5 hours Charging interface type: Micro USB interface Transmission distance: 30 meters (non partition wall) Battery life: 3-4 hours Product size: 11*4*1.5cm Plug size: 6.35mm Product weight: 55g