Наушники KOSS M 15

Unique electret mcirophone design provides flexible usage for hand-held or hands-free communication
Ideal for voice activated and voice recognition software and computer games with sound cards that have built in bias supply*
Unidirectional microphone design for maximum sensitivity and optimized pick up pattern
Microphone Impedance: (same as load) 2.2k ohms when used with Koss battery bias supply
Frequency Response: 100-16,000 Hz

Frequency Response 100-16,000 Hz
Impedance (same as load) 2.2k ohms when used with Koss battery bias supply
Weight 3.5 oz.
Sensitivity -60 +/- 3dB @ 1kHz,
re: 1V/1 µ bar