Wireless receiver:Diversity, one channel Carrier frequency:VHF 179.000 MHz Frequency stability:�0.005 % S/N-ratio:>90 dB Selectivity:>80 dB Dynamic range:>80 dB Modulation method:FM-frequency modulation Frequency response:50 Hz - 20,000 Hz (� 3 dB) Audio output:Mono ¼" jack-socket, XLR-socket Power supply:230 V AC, 50 Hz ~; via 17 V DC, 300 mA power unit incl. in delivery Power consumption:5 W Dimensions:195 x 140 x 40 mm Weight:500 g Wireless microphone: RF power output:0.03 mW Coverage:50 m (with line-of-sight) Power supply:1 standard 9 V battery Current consumption:approx. 65 mA Battery life approx. 6 hours : Dimensions (DxH):50 x 260 mm Weight:360 g