Feature: 1. SCOPE OF APPLICATION: Guitar transmitter receiver can be used for guitar, bass, violin and other electro acoustic instruments. 2. UHF 730MHZ: Wireless guitar transmitter receiver supports UHF 730MHz acoustic transmission, anti jamming, and ultra short delay. 3. SUPPORT 4 CHANNELS: Guitar wireless system supports 4 groups of devices for simultaneous use, with a maximum transmission range of 30m/98.4ft. 4. 600MAH RECHARGEABLE BATTERY: 4 channels guitar transmitter receiver has a built in 600mAh rechargeable lithium battery with up to 4 hours of usage time. 5. PLUG AND PLAY: Digital guitar wireless transmitter receiver is plug and play, easy to use, small size, light weight, easy to carry. Specification: Item Type: Guitar Wireless System Material: ABS Frequency Range: UHF Frequency Bandwidth: 20Hz-20kHz Transmission Delay: <4 Ms Charging Interface: Micro USB Charging Time: 2 Hours Use Time: 4 Hours Battery Type: Lithium Battery Transmitter Battery Capacity: 600mAh (Included) Receiver Battery Capacity: 600mAh (Included). Package List: 1 x Transmitter1 x Receiver1 x Charging Cable1 x Instruction Manual