Frequency response: 50Hz-20KHz Impedance: 680 Ohm Microphone size: Ø9.7 * 5.0 Sensitivity (sensitivity): - 42dB ± 1.5dB (0dB = 1Pa) Directivity: single-point, heart-type point Plug: 3.5mm Diameter: 2.0MM color weave wiring Cord length: about 1.2m Package:1*Dual Ear Hook Headset Head Microphone