Audio power output 40W maximum 6 OhmsInternal battery Built-In 12V/3.3A (Rechargeable Battery)External power 12VDC 3A DC supplyBuilt-in charger 100~240VAC/50~60HzAC power consumption 40 VAInput sensitivity 52dB +/-2dBFrequency response 150-15KHz +/-3dBT.H.D. 1% @400HzInputs Wireless mic hardwired mic inputsTone control range Hi +/-6dB at 10KHz Low +/-6dB at 100HzWireless operating frequency range 170-216MHz FM (3E)Battery/hours 9V/ 8HoursWireless operating distance 100 ft. typical up to 200 ft. line of sightDimension 7” x 9” x 11.5” (178cm x 229cm x 292mm)Weight 12.4 lb. (5.63 kg.)