<p>Frequency band range:550-573MHz </p> <p>Number of channels:20CH </p> <p>Frequency response.20Hz-20KHz </p> <p>Usage distance:About 50 meters </p> <p>Total harmonic distortion: 0.2%</p> <p>Sampling rate:24 Bit\/48kbps Audio</p> <p>Compatible devices: Dynamic mic\/ condenser mic\/ mixer\/amplifier\/audio system </p> <p>Usage time. Approximately 8-10 hours </p> <p>Battery specifications: Built in lithium battery </p> <p>Dynamic range:110dB </p> <p>Delay rate.3 milliseconds</p> <p>Color: Black</p> <p>Material: ABS</p> <p>Package Contents:</p> <p>1 x Wireless microphone transmitter </p> <p>1 x Wireless microphone receiver</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>