Features: Rockville RWM1000VH VHF Wireless Single HandHeld Microphone Mic System High performance wireless microphone system Includes transmitter with a handheld microphone 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: 80dB S/N: 80dB Operating Temperature: 41°F-113°F Carrier Frequency Range: 180-280MHz Reciever 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