Usage Tips:Clear Audio Quality--The wireless guitar mitter receiver system adopts advanced UHF technology, high frequency which less than 4ms latency, supporting 3 sets of devices working at the same time (1 to 1), no lag or no signal loss. Effective mission range is about 100 feet. Strong anti-interference ability delivers great audio quality and stable signal and maintains the tone and feel of your instruments and playing. Plug and Play--Pull up to turn on the power and paired automatically. and hold the mitter for 3 seconds to switch 2 modes. Green light showing on the receiver works in acoustic guitar mode, and blue light works in electric guitar mode. That's how simple it is. No wires, more freedom. High Compatibility--The 1/4inch audio jack, compatible with most electric guitar, violin, drum, bass, keyboard, Bakelite guitar, electric-acoustic guitar and other digital music instruments with pickup. Compact and light-weight design fits any guitar and bass body types. The device are approved for worldwide use. Legible and Easy to Use--One unit is labeled for the guitar ( mitter), and one for the amp (receiver). Literally just plug and go. design is easy to recognize and play. It is the for beginner guitar, professional guitarist, bass player. Built-in Rechargeable Li-battery--Working time is up to 4 after 1.5 . Comes with a dual-ended Micro-USB cable for convenient recharging simultaneously, which ensures good performance for your every show. A must have for guitarist! Colour:black Material:plastic Package Contents: 1 x Guitar mitter 1 x Guitar Receiver 1 x USB Cable 1 x English manual 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.