KOSS HD 33

Frequency Response: 30-16,000 Hz
Lightweight stereophone for use with your personal computer, home or portable audio system
Foam ear cushions for open, hear-through sound
Durable plastic, adjustable headband fits any head size
Volume control on cord for easy level adjustment
Straight, single-entry 4 foot cord
1/8" stereo plug

Frequency Response 30-16,000 Hz
Cord Straight, Single Entry, 4ft
Plug 3.5 mm
Impedance 32 ohms
Weight 2.5 oz.
Sensitivity 91 dB SPL/1mW
Distortion <1.0%
Ear cushions open