Koss PORTAPRO Headphones

Koss PORTAPRO stereophone headphones feature a dynamic element design for deep bass performance. The Comfort Zone setting on the temporal pad assures a safe, comfortable fit. The PORTAPROs are ideal for use with a walkman or other portable electronics. The headphones are small and they collapse for maximum portability. Features: Frequency response: 15-25, 000 Hz Multi-pivoting earplates and adjustable headband for added comfort Includes convenient carrying case Includes 1/8" and 1/4" stereo plugs for home and portable use Straight, dual entry 4' cord Plug: 3.5mm/6.4mm Impedance: 60 ohms Weight: 2.1 oz. Sensitivity: 101dB SPL/1mW Distortion: Ear cushions: ope