High-quality wireless audio transmission system(transmitter + receiver) for guitar, bass and other instruments. 2.4GHz wireless transmission, 24bit/48KHz sample rate. 30 meters effective outdoor distance or 15 meters distance to through the wall. Support 3.5mm and 6.35mm plug, 190 rotating device, it is available for most of the electric instruments. Up to 4 groups of equipment can be used simultaneously in the same environment. Equipped with a charging box, you can use the USB cable to charge , Transmitter and Receiver can be in , also can use the USB cable to charge them. It can be used for 4 hours after Transmitter and Receiver fully . When the Transmitter and Receiver running low, you can use the charge box to charge them. Delay: Less than 6.7ms Dynamic Range: 105dB Frequency Response: 20-20KHz, +1dB/-3dB Wireless Band: 2.4GHz Sample Rate: 24bit/48KHz Battery Capacity: Transmitter: 600mAh, receiver 300mAh, charging box: 2000mAh Remarks (without charging box) Colour:Black Material:plastic Package Contents: 1 x Transmitter 1 x Receiver 1 x Type-C Cable 1 x Manual(English) Only the above package content, other products are not included. Note: Light reflection 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.