Feature - The headphones are equipped with an individually adjustable headband which adapts to the shape of your head More product information - Basic4Music - a musical companion for every situation What s in the Box - 1 pair of \"Basic4Music\" stereo headphones - Operating instructions Technical Details Design (Colour, Pattern, Motif, Series) Colour Black/Silver Line Basic4Music Connectivity (Connection) Connection 3. 5 mm Jack Plug Size & Weight Cable Length 1, 20 m Speaker Diameter 27 mm Electrospecific Properties Frequency Range 20 Hz - 20 kHz Impedance 32 ? Field of Application Recommended Use Mobile Music/Mobile Phone Physical Properties Design On-Ear Material Metal/Synthetic Material Model Stereo Sensitivity 100 dB/ mW Volume Control No