Measy AU688-U 20-Channel Wireless Guitar System Rechargeable Musical Instrument Transmitter Receiver, AU688-U Black

1. 100 meters transmission distance (330FT)
2. Built-in lithium battery, charge once, battery life 5-6 hours
3. Strong anti-interference, can penetrate walls
4. Built-in damping shaft, 270 degree rotation to adjust orientation
5. Plug and play, lossless sound quality
6. Working channel: channel 20
7. Reception sensitivity: -90dBm
8. Frequency response range: 20-20000Hz
9. Frequency range: U frequency
10. Delay time: less than 0.5ms
11. Sampling rate: 64KHz, 16bit
12. Signal to noise ratio: 95dB
13. Distortion: 0.3% at 1KHz
14. Dynamic range: 90dB
15. Dimensions: 11.66x3.66x1.63 cm