Model Nl: ISP-400 Output RMS 6W (3W+3W) THD=10% Frequency response 150-18000Hz (±3Db) Frequency range 2.401-2 .480 GHz The receiver sensitivity <-90dBm, BER <0.1% SNR 89dB Distortion <0.2% Operating temperature -10 °C ~ 55 °C Power supply 5V/1000Ma, AC power adapter.