Video of RWM1203VS: Features: Rockville RWM1203VS VHF Wireless Dual Headset Microphone Mic System High performance wireless microphone system Includes transmitter with (2) headset microphones H igh sensitivity, unidirectional, wireless cardioid microphones Featuring a dual filter design to limit feedback and interference Transmitter automatically links to receiver for ease of use Durable composite microphone construction Comfortable ergonomic design System Operating Range: 100´-200´(indoor), 65´-165´(outdoor) Frequency Range: 80MHz-12000MHz Dynamic Range: 110dB S/N: 90dB Operating Temperature: 14°F-122°F Frequency Stability: ±0.005% Carrier Frequency Range: 180-280MHz Receiver Sensitivity: (S/N=30dB) >2mV De-Emphasis: 50µS Audio Output Impedance: 600O Audio Output Level.: 0-0.5V Power Supply: AC110V /50Hz Current Consumption: =50mA Audio Out Connector: 1/4 unbalanced Transmitter Frequency Stability: ±0.005% RF Output Power: =30mW Modulation Mode: VHF Maximum Deviation Range: ±50KHz Microphone Mode: Fixed Pre-Emphasis: 50µS Power Supply: 9V Batt./1.5V×2 Current Consumption: =35mA Click Here To View Owners Manual