Ws-20 2.4G Wireless Rechargeable Electric Guitar Transmitter Receiver Set 30 Transmission Range Black Color 2.4G uncompressed wireless transmitting, ultra-short delay, and transmission range is about 30 . 180 degree rotatable 1/4 inch plug, available for instruments with input in different positions. Supports 6 sets of devices working at same time, one-to-one. It is easy to use, plug and play. Product Name: Guitar Transmission System Model: WS-20 Transmission Range: About 30M (No obstacle) Dynamic Range: 105db Power Supply: Built-in 3.7V 1100mA lithium battery Colour:black Material:ABS Package Contents: 1 * receiver 1 * transmitter 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.