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.