A8 Guitar Pickup Wireless System Transmitter Receiver for Electrical Guitar Bass Rechargeable Guitar Pickup Transmission System Features The wire transmitter and receiver is used for electroacoustic instruments, such as guitar, bass, violin and so on. Uhf 730mhz acoustic transmission, anti-interference, ultra-short delay Support the simultaneous use of 4 groups of devices, the maximum transmission range of up to 50 meters Built-in chargeable li-on for long working hours; Comes with USB cable for charging conveniently Plug and Use: Easy to use; Portable to carry around for its lightweight and small volume Specifications Color: Black Material: ABS + Metal Audio Response Range: 20Hz-20kHz Frequency: High Frequency 730mhz Transmission Range: Max.50m (barrier-free) 30m (through the wall) Transmission Delay: Less Than 4ms Power: Built-in 3.7V 600mah Chargeable Li-on Charging Time: 2h Continuous Use Time: 6 Hours Charging Port: Micro USB Product Size: 11 x 1.5 x 1.5cm Product Weight: 230g Package Dimensions: 17.5 x 10.5 x 5cm Package Weight: 250g Packing: Carton Box Packing list of each 2 x Pickup 1 x USB Cable 1 x Chinese and English User Manual