Specification Item Type: Wireless Guitar System Material: ABS Wireless Power: 10mW Sampling: 48K 24bit Distortion: <0.05% Sound Delay: <1ms Transmission Distance: > Approx. 50meter / 164ft Response Range: 20Hz-20KHz Signal to Noise Channel: 90dB Battery Type: Built-in rechargeable lithium battery Battery Capacity: 560mAH Size(LxW): Approx. 95 x 38mm / 3.7 x 1.5in How to Use: 1. Long press the transmitter power button for 1 second, the ID indicator lights up, and the transmitter turns on. In the power-on state, press and hold the power button for 1 second to shut down. 2. Long press the receiver power button for 1 second, the ID indicator lights up, the receiver is turned on, paired and connected, and when it is turned on, press and hold the power button for 1 second to shut down. Package List: 1 x Wireless Receiver 1 x Wireless Transmitter 1 x USB Cable 1 x User Manual Note: If you turn on the receiver first, the ID indicator will flash slowly, then when you turn on the transmitter, the ID indicator will become steady on and no longer flash.