Feature: 1. 100m/330ft transmission distance, U‑band frequency, longer transmission distance, more stable and clear sound quality. 2. The transmitter and receiver are 750MA built‑in lithium batteries, which can last for 5‑6 hours of lithium battery life. 3. Strong anti‑interference performance, longer distance through wall and obstacles. 4. Built‑in damping shaft, 270 degree rotation to adjust the orientation, provide more possibility. 5. Plug and play, convenient to operate, with lossless sound quality, good guitar audio system. Specification: Item Type: Guitar Audio SystemMaterial: ABSColor: As Picture ShownWeight: Approx. 158.0g/5.6ozWorking Channel: 20CH Receiving Sensitivity: -90dBm Frequency Response Range: 20-20000Hz Sending and Receiving Distance: 100m Frequency Range: U Frequency Delay Time: <0.5ms Sampling Rate: 64KHz 16bit Noise Ratio: 95dB Distortion: 0.3% 1KHz Dynamic Range: 90dB Battery Capacity: 750mah. Package List: 1 x Transmitter1 x Receiver1 x Charging Cable1 x Manual