Pro Lavalier Lapel Microphone JK MIC-J 044 Compatible with Sennheiser Wireless Transmitter - Omnidirectional Condenser Mic Sweat and Dust-Proof Made Primarily for Indoor and Outdoor Activities Professional Vocal Pickup, Pristine Audio Quality, Omni-directional Condenser Microphone 1/8 Inch (35mm) Locking Screw Plug Compatible With Sennheiser Evolution Series, G2, G3, EWD1, SK D1 / Line 6 X2 Digital Wireless Microphone System Designed for Broadcasters, TV Presenters, Lecturers, Musicians, Actors, Singers, and Any Other Applications Requiring Minimum Microphone Visibility with Hands-free Operation 1/8 Inch Locking Screw Plug For Sennheiser Wireless Transmitters Sweat and Dust-Proof, Made Primarily for Indoor and Outdoor Activities Professional Vocal Pickup, Pristine Audio Quality, Omni-directional Condenser Microphone Designed for Broadcasters, TV Presenters, Lecturers, Musicians, Actors, Singers, Performers and Any Other Applications Requiring Minimum Microphone Visibility with Hands-free Operation Polar pattern: Omni-directional Mic diameter: 6.0*5.0mm Sensitivity: - 44db2db SNR: &gt;63db Wire: 1.1m 2pcs of windscreens Frequency Range: 20-20KHZ Output Impedance: 2200 ohms Standard Operation Voltage: 2.0V-10V.DC