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, for electric guitars, , acoustic guitars and other digital music instruments, the device are approved for worldwide . 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. User--The double-sided USB cable can charge the transmitter and receiver simultaneously,easy to switchover between the 4 signal channels. Long Battery Life--in battery with over 8 hrs battery life once fully charged, enough to enjoy the wireless world in your gig. 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 the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.