More product information - Ideal for MP3 players What s in the Box - 1 pair of \"HK-229\" on-ear stereo headphones - Operating instructions Technical Details Design (Colour, Pattern, Motif, Series) Colour Silver Line HK-229 Electrospecific Properties Frequency Range 20 Hz - 20 kHz Impedance 24 ? Connectivity (Connection) Connection 3. 5 mm Jack Plug Size & Weight Cable Length 1. 5 m Speaker Diameter 30 mm Physical Properties Design On-Ear Material Synthetic Material Model Stereo Sensitivity 103 dB/ mW