Наушники KOSS M 6

Unique electret microphone hanger design allows you to attach to your jacket or computer audio system for hands free communication and storage
Unidirectional microphone for maximum sensitivity and optimized pick up pattern
Microphone Impedance: (Same as load resistance) 2.2k ohms when used with Koss battery bias supply
Frequency Response: 50-8,000 Hz

Frequency Response 50-8,000 Hz
Impedance (same as load) 2.2k ohms when used with Koss battery bias supply
Weight 0.2 oz.
Sensitivity -63 +/- 3dB @ 1kHz,
re: 1V/1 µ bar