Wireless mitter and receiver set designed for electronic music inst ents like guitar, bass, etc. 2.4GH uncompressed wireless signal mission, low noise and latency. Built-in rechargeable battery, long working hours, and comes with USB cable for convenient recharging. 270 degree rotatable 1/4 inch plug, available for inst ents with input jack in different positions. Supports 4 sets of devices working at same time, The maximum mission range can reach 50 meters. Audio response range: 20Hz-20kHz Frequency: 2.400GHz-2.483GHz mission range: max.50m (barrier-free); 30m (through walls) mission delay: less than 12.5ms Power supply: Built-in 3.7V 600mah rechargeable lithium battery Charging time: 2 hours Continuous use time: 4-6 hours Charging port: micro-USB size:116 x 43 x 17mm Material:ABS colour:black Package Contents: 1 x mitter 1 x Receiver 1 x USB Charging Cable 1 x User Manual 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.