Fangrui Product Details Wireless Mitter Receiver Set For Electroacoustic Musical Inst Ents Like Guitar, Bass, Etc. Uhf 730mhz Original Sound Mission, Anti-interface And Ultra-short Delay, Giving You The Music Sound. Supports 4 Sets Of Devices Working At Same Time, One-to-one; And Max. Mission Range Is Up To 50 Meters. Built-in Rechargeable Lithium Battery, Long Working Hours; And Comes With Usb Cable For Convenient Charging. Plug And Play, Simple To Use; Compact Size And Lightweight, Easy To Carry. Color: Black Material: Abs Audio Response Range: 20hz-20khz Frequency: Uhf 730mhz Mission Range: Max.50m (no Obstacle); 30m (through-wall) Mission Delay: Less Than 4ms Power Supply: Built-in 3.7v 600mah Rechargeable Lithium Battery Charge Port: Micro-usb Item Size: 11 * 4.5 * 1.5cm / 4.3 * 1.8 * 0.6 Inch Item Weight: 35g / 1.2oz (for Each) Note: The Guitar And Guitar Amplifier Showed In The Picture Are Not Included. Package Contents: 1 * Mitter 1 * Receiver 1 * User Manual 1 * Usb Charging Cable(random Color) Only The