Audio transmitter & receiver set designed for electronic music instruments like guitar, , etc.24G uncompressed wireless transmitting, ultra-short delay, and transmission range is about 30 meters.Built-in a 1100mAh rechargeable lithium battery, long working hours, and with USB port for charging.Supports 6 sets of devices working at same time, one-to-one.It is easy to use, plug and play.180 degree rotatable 1/4 inch plug, available for instruments with input jack in different positions.pecifications:Model: WS-20Transmission Range: About 30M (No obstacle)Dynamic Range: 105db Supply: Built-in 37V 1100mA lithium batteryColour:Gold+blackMaterial:ABS+ElectronicsSize:140 x 43mmPackage Contents:1 * Transmitter1 * Receiver1 * English Manual1 * USB Charging CableOnly 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.