The Koss PortaPro collapsible stereophone combines high-quality sound reproduction with a unique design for the ultimate in convenience and comfort. These over-the-head headphones have a dynamic element design for deep bass performance and a frequency response of 15 to 25,000 Hz to ensure the music comes through clear and bright.
Also designed for comfort, these headphones have two adjustable temporal-comfort zone pads to shift the pressure and perfectly balance the ear plates on your ear. The open-earphone ear plates are multipivoting and, together with the adjustable headband, allow for maximum comfort.

The PortaPros are collapsible and come with a carrying case, so it's still easy to take them with you even when you're not wearing them. A 0.25-inch adapter is included to ensure they will fit with any system.

Product Description
Dynamic element design for deep bass performance; Comfort zone setting on temporal pad for comfortable, secure fit; Multi-pivoting earplates and adjustable headband for added comfort; Collapsible for maximum portability when listening on the go; Includes convenient carrying case; Includes 1/8" and 1/4" stereo plugs for home and portable use; Straight, dual entry 4 foot cord; Frequency response: 15-25,000 Hz.

Product 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
Technical Details
Brand Name: Koss
Model: 155491
Headphones Form Factor: Semi-open
Headphones Technology: Binaural
Item Weight: 2.2 pounds