[Plug and Play]: Audio wireless mitter receiver only need to turn it on, no need to do anything for the mitter 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 mission]: 2.4GHz wireless guitar tsystem uncompressed wireless signal mission, no interference, over 30m/100 feet mission distance, low noise, low latency (less than 4ms" ), no wires, more freedom [Rechargeable Internal Batteries]: Wireless guitar mitter and receiver built-in rechargeable battery, come with a double-sided usb cable can charge the mission simultaneously, fast and convenient [Worldwide Used]: Our guitar wireless mitter, 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 mitter 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.