Наушники KOSS M 21

Unique electret microphone design provides flexible usage for hand-held or hands-free communication
Ideal for voice activated and voice recognition software and computer games
Unidirectional microphone for maximum sensitivity and optimized pick up pattern
Microphone Impedance: 5000 oms
Frequency Response: 100-16,000 Hz
Includes (2) "AAA" batteries

Frequency Response 100-16,000 Hz
Impedance 5000 ohms
Weight 3.5 oz
Sensitivity -70 +/- 3dB @ 1kHz,
re: 1V/1 µ bar