BRONSTEIN LM16 Lavalier - Omni-directional Polar pattern: Omnidirectional, Frequency Range: 20-20KHz Sensitivity:-53dB 3dB @ 74dB SPL Voltage Rated: 1.3 ~ 3V (fits typical TA3F, TA4F, 3.5mm recorders) Output Impedance: 4.4 kOhm Includes Windscreen, Tie-clip, Wire: 1M