Наушники KOSS R 50B

Frequency Response: 30-20,000 Hz
Stereophone with noise reduction electret microphone for hands free communication from your personal computer
Microphone impedance: Same as load resistance
Dynamic stereophone element for extended frequency response
Closed leatherette cushions for isolation and improved bass
Pivoting earcups for maximum comfort during extended listening periods
Adjustable headband fits any head size or shape
Straight, dual entry, 8 foot cord with stereophone and microphone plugs
Includes bias supply for easy microphone connection from any sound card system

Frequency Response 30-20,000 Hz
Cord Straight, Dual Entry, 8ft
Plug 3.5 mm/6.4 mm
Impedance 60 ohms
Weight 5.1 oz.
Sensitivity 103 dB SPL/1mW
Distortion <0.1%
Ear cushions closed