SPORTING CHOICE.Jog, pedal, skate, climb - your K 326 headphones will be right there with you. These light earphones with a comfortable ear hook design are firmly in place through even the most challenging maneuvers. You will appreciate the in-line microphone and volume control that allow you to sport and talk at the same time, with no interruption. Key SpecificationsSystem: DynamicDesign: Semi-open headphonesFrequency range: 17Hz to 23kHz Sensitivity: 126dB SPL/VInput impedance: 32 ohmsMaximum input power: 15mWNet weight (without cable): 5gCable: 99.99% oxygen-free cable, 1.2mMain connection: Jack plug 3.5mm, hard gold-plated