Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si [Plug and Play]: Audio wireless transmitter receiver only need to turn it on, no need to do anything for the transmitter and receiver to connect with each other, plug it and enjoy your musical world. Different lights indicate: Red light for charging. Green light for acoustic guitar. Blue light for electric guitar. Please use a 5V charger to charge the product, otherwise the battery will be damaged. [Clear Wireless Audio Transmission]: 2.4GHz wireless guitar tsystem uncompressed wireless signal transmission, no interference, over 30m/100 feet transmission distance, low noise, low latency (less than 4ms" ), no wires, more freedom [Rechargeable Internal Batteries]: Wireless guitar transmitter and receiver built-in rechargeable battery, come with a double-sided usb cable can charge the transmission simultaneously, fast and convenient [Worldwide Used]: Our guitar wireless transmitter, 280 rotatable 6.35mm plug design(1/4inch plug), compatible for electric guitars, electric basses, acoustic guitars, violin, keyboards, and other digital music instruments, even suitable for electric saxophone Material: plastic colour: Blue Package Contents: 1 x Guitar wireless Transmitter 1 x Guitar Receiver 1 x USB Cable 1 x English instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.