Amazon.com Product Description
The Koss KSC20 stereo headphones were designed for users on the go. Koss's sport-clip design eliminates the headband for lightweight comfort and portability. Fitting snugly in the ear and looping behind, the KSC20 earpieces can be worn even during strenuous exercise.
The Koss KSC20 headphones have a 0.125-inch plug, compatible with nearly all portable audio products. They have a frequency response of 20 to 20,000 Hz, sensitivity of 98 dB per milliwatt, and less than 1.0 percent distortion. They are a light 0.35 ounces with a straight, dual-entry 4-foot cord.
Product Description
When you want lightweight comfort and portability, you probably don't want a headband. These KSC-20 stereo headphones will put vivid 20-20, 000 Hz sound right next to your eardrums. A 4-foot straight, dual-entry cord with 3.5 mm plug is perfect for portable CD, cassette or radio. Koss Sportclip design, ear cushions and .35 lb. weight assure featherlight comfort. Who needs a headband?