Professional Headset Microphone Mic for Sennheiser Wireless 

Stereo 1/8" (3.5mm) Screw Lock

High quality microphone capsule with Cardioid-directional polar pattern 
for vocal, speech, dance and sport applications, for instrumental artists and solo entertainers 
with windscreen

Feature:

Element: Back Electret Condenser
Polar Pattern: Cardioid-Directional
Frequency Response: 10Hz-16KHz
Sensitivity: -45dB±2dB
Max.Input SPL: 132dB(At 1KHz≤1% T.H.D)
Output Impedance: 2000Ω±30%(at 1KHz)

Plug: safely 3.5mm Screw Lock Plug. ( Compatible with Sennheiser Transmitter series EW100, EW300,  EW500, G1 G2 G3)