This product is a device specially developed for wireless connection of electric guitars. This wireless device has low noise, low latency, high-quality sampling rate (48KHz) and long effective transmission distance. The wireless device has a built-in 600mAh lithium battery. We provide a special USB charging cable. Please that the device is turned off when charging. Please turn off the device when not in use, otherwise the power will continue to be consumed. When connecting or disconnecting wireless devices from guitar speakers and other equipment, be sure to turn off the power and other related devices. This will help avoid malfunctions. This device broadcasts in the 760MHz frequency band, successfully avoiding interference caused by television stations, public broadcasting, cell phone towers and other high-power signals. Product parameters Sampling rate: 24bit/48KHz compressed data transmission Delay: Less than 12ms Effective range: ≦30 meters outdoor transmission Distortion: Less than 0.03% Dynamic range: 100dB Frequency of use: U band Frequency response: 20-20KHz, +1dB/-3dB 280 degree rotatable joint, suitable for most electronic speakers Can support 6 groups of devices working at the same time 600mah lithium battery capacity, USB charging interface, up to 4 hours of battery life. Material: ABS colour: black Package Contents: 1 x Transmitter 1 x Receiver 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.