E-8008UHF conference wireless microphone TRANSMITTER Operating frequency :500-980MHz Transmitter power :H 10dBm ,L 0dBm Modulate mode :FM Maximum modulation : ±45KHz High wave :<main wave 60dB Power supply :2 * AA batteries ,standing time :about 8 hours RECEIVER Operating frequency :500-980MHz (adjustable) Power adaptor supply voltage :AC110/230V 50Hz/60Hz Operating voltage :DC 13.8V 1500mA Special sensitivity of receiver selective switch S/N ratio :>105dB T. H. D distortion :<0.5% Frequency response :40Hz-18KHz Noise locked+ pilot tone locked