Features 1、wireless audio transmit system(transmitter + receiver) for guitar, bass and other instruments. 2、Equipped with a charging box, you can use the USB cable to charge the box, Transmitter and Receiver can be charged in the box, also can use the USB cable to charge them. 3、2.4GHz wireless transmit, 24bit/48KHz sample rate. 4、30 meters effective outdoor distance or 15 meters distance to through the wall. 5、Support 3.5mm and 6.35mm plug, 190° rotating device, it is available for most of the electric instruments. 6、Up to 4 groups of equipment can be used simultaneously in the same environment. 7、It can be used for 4 hours after transmitter and receiver fully charged. When the Transmitter and Receiver running low, you can use the charge box to charge them. Specifications: Specifications: Material: ABS Delay: <6.7ms Dynamic Range: >105dB Frequency Response: 20-20KHz, +1dB/-3dB Wireless Band: 2.4GHz Sample Rate: 24bit/48KHz Battery Capacity: Transmitter: 550mAh, receiver 450mAh, charging box: 2000mAh Item Size: 123 * 31 * 13mm / 4.84 * 1.22 * 0.51in Charging Box Size: 80 * 65 * 45mm / 3.15 * 2.56 * 1.77in Item Weight: 169g / 5.96oz Package Weight: 257g / 9.07oz Package Size: 11.5 * 7.5 * 5cm / 4.53 * 2.95 * 1.97in Package List 1 * Transmitter 1 * Receiver 1 * Charging Box 1 * Type C Cable 1 * Manual(English)