Features:

• Dynamic-element design for deep bass performance
• Comfort Zone setting on temporal pad for comfortable, secure fit
• Collapsible for maximum portability when listening on the go
• Multipivoting ear plates and adjustable headband for added comfort
• Includes convenient carrying case

• AFC (automatic frequency control): N/A
• Cord length: 4 feet
• Earpiece: Open, cushioned
• Headband style: Over the head
• Headphone inline volume control: No
• In the box: Koss PortaPro collapsible stereophone, carrying case
• Termination: 0.125-inch stereo minijack/0.25-inch stereo plug (with adapter)
• Mono switch: No
• Frequency response (+/- 3 dB): 15 to 25,000 Hz
• Impedance: 60 ohms
• Sensitivity/efficiency (DIN-45 measurement): 101 dB
• Warranty, parts: Lifetime
• Warranty, labor: Lifetime