Rockville RWM1000VH VHF Wireless Single HandHeld Microphone Mic System Rockville RWM1000VH VHF Wireless Single HandHeld Microphone Mic System. High performance wireless microphone system. Includes transmitter with a handheld microphone. High 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: 41F-113F. Carrier Frequency Range: 180-280MHz. Reciever. Sensitivity: (S/N=30dB) &gt;2mV. De-Emphasis: 50S. Audio Output Impedance: 600. 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: 50S. Power Supply: 9V Batt./1.5V2. Current Consumption: 35mA. Rockville RWM1000VH VHF Wireless Single HandHeld Microphone Mic System High performance wireless microphone system Includes transmitter with a handheld microphone High 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 Frequency Stability: 0.005% RF Output Power: =30mW Modulation Mode: VHF Maximum Deviation Range: 50KHz Microphone Mode: Fixed Pre-Emphasis: 50S Power Supply: 9V Batt./1.5V2 Current Consumption: =35mA Operating Range: 100-200(indoor), 65-165(outdoor) Frequency Range: 80MHz-12000MHz Dynamic Range: 80dB S/N: 80dB Operating Temperature: 41F-113F Carrier Frequency Range: 180-280MHz Sensitivity: (S/N=30dB) &gt;2mV De-Emphasis: 50S Audio Output Impedance: 600O Audio Output Level: 0-0.5V Power Supply: AC110V /50Hz Current Consumption: =50mA Audio Out Connector: 1/4&#034; unbalanced