Fangrui Product Details 1. 4g Wireless Guitar System Transmitter Receiver Rechargeable 30m Transmission Range For Electric Guitar Bass 2.4g Uncompressed Wireless Signal Transmission, Low Noise And Latency, Effective Range Is About 30 Meters. Built-in Rechargeable Lithium Battery, Long Working Hours, And Comes With Usb Cable For Convenient Recharging. Supports 6 Sets Of Devices Working At Same Time, One-to-one And No-interference; And One Transmitter Can Transmit Signal To Several Receivers At The Same Time. 280 Rotatable 1/4 Inch Plug, Available For Instruments With Input Jack In Different Positions. Wireless Transmitter Receiver Set Designed For Electronic Music Instruments Like Guitar, Bass, Etc. Frequency Response: 20-20khz, +1db/-3db Power Supply: Built-in 3.7v 550ma Rechargeable Lithium Battery Charging: Usb Port Material:abs Color:silver Package Contents: 1 X Wireless Receiver 1 X Wireless Transmitter 1 X Usb Cable 1 X English Instruction Manual Only The Above Package Content, Other Products Are Not Included. Note: L