Lavalier Lapel Microphone w/ Screw Lock Connector 3.5mm for Sennheiser Compatible Model: SK100, SK300, SK500, EW, G2, and G3 Series Polar Pattern: Omnidirectional Frequency: 50 Hz-18,000 Hz Sensitivity: -60dB +/- 3dB Operating Voltage: 1V-10V DC