Driver Unit: 40mm Diameter (Speaker), 6 x 5mm (Microphone)

Impedance: 32 ohm (Speaker) and 2.2K Ohm (Microphone)

Frequency Response: 20 20,000 Hz (Speaker)

Speaker Sensitivity: 98dB 3dB SPL @1 KHz

Microphone Sensitivity: -58dB 3dB SPL @1 KHz

Current Consumption: 2.0V

Plug (connector) to PC : 2 x 3.5mm stereo (Mic & Speaker)

Works with PC Windows/MAC OS X/Linux Kernel

Weight 1000 g