Pro Lavalier Noise Cancelling Lapel Microphone (Black) For Sennheiser Wireless Bodypack TransmitterIdeal replacement for original Lapel microphones, the "JK" headset offers a smooth frequency response with predictable performance. Compatible with Sennheiser Evolution Series, G2, X2/Trantec/Kam wireless transmitters with 3.5mm Locking Jack Plug input.This lapel microphone is specially designed for stages, outdoor activities where background noise will sometime cause a problem. This mic uses unidirectional cartridge. With its noise cancelling design, it will cut down on much of the background noise and result in a more accurate transcription. FEATURES3.5mm Screw Locking Jack PlugProfessional vocal pickup condenser microphoneSweat and Dust-Proof Made Primarily for Indoor and Outdoor professionalsDesigned for Use on Stage, Houses of Worship, Lecturers and Other Applications Requiring Minimum Microphone Visibility with hand-free OperationSPECIFICATIONPolar pattem: UnidirectionalMic diameter: 6.5*5.0mmSensitivity: - 47db±2dbFrequency Range: 20-20KHZOutput Impedance: Standard Operation Voltage: 2.0V-10V.DCSNR: >58dbWire: 1.1m2pcs of windshieldsAlso available of ultra lightweight "PRO" headworn / lapel microphones with 4 pin Mini XLR TA4F connector, 3pin Mini XLR TA3F connector, and 4 pin Hirose Audio-Technica connector.