-Color: Black 40mm is the driver diameter. Synthetic leather is the earpad material. The sensitivity is 114 +/- 3dB, and the response frequency is between 20 Hz and 20 KHz. -Impedance of the microphone: < 2.2 Ohm The sensitivity of the microphone is -38 +/- 3dB (0dB = 1 V/PA). -Frequency of microphone: 100 Hz to 10 Hz -Omndirectional Polar Microphone Pattern Plug size: 2x3.5mm - OS compatibility: Windows XP/Vista/7/8/10/11