The Koss KPH14 side-firing headphones are designed specifically for active lifestyles and working out. They are sweat resistant and have a fully adjustable comfort fit headband. These light weight non-isolating headphones are covered under the Koss Stereophones Limited Lifetime Warranty. Specifications: Frequency Range: 100 - 15,000 Hz, Impedantion: 16 Ohms, Sensitivity: 104 dB SPL, Straight, Dual Entry, 4ft cord. Finish: Violet