Clear Quality Signal Transmission-2.4GHz band is optimal for guitar wireless system,low noise,low latency(less than 5mS), no interference, over 20 meters transmission distance. High Compatibility-The plugs can be rotated for 220 degrees, compatible for most electric guitars, bass, acoustic guitars and other digital music instruments, the device are approved for worldwide use. Easy to Pair-Turn on the transmitter and the receiver, press the pairing button of the receiver,then press the pairing button of the transmitter for more than 2 seconds,then they're paired successfully. -friendly-The double-sided USB cable can charge the transmitter and receiver simultaneously,easy to switchover between the 4 signal channels. Long Battery Life-Built-in battery with over 8 battery life fully , enough to enjoy the wireless world in your . Material:ABS+Metal colour:Black Package Contents: 1 * Transmitter 1 * Receiver 1 * USB cable Only the above package content, other products are not included. Note: Light 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.