Rockville RWM1005VC VHF Wireless Single Lavalier/Clip-On Microphone Mic System Rockville RWM1005VC VHF Wireless Single Lavalier/Clip-On Microphone Mic System w/ Dual Filter to Limit Feedback and Interference Rockville RWM1005VC VHF Wireless Single Lavalier/Clip-On Microphone Mic System. High performance wireless microphone system. Includes transmitter with a Lavaliere/Clip-On 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