- Basic4Music – the music system for every situation ,- The headphones are equipped with an individually adjustable headband which adapts to the shape of your head - Connection: 3.5 mm Jack Plug ,- Design: On-Ear ,- Material: Metal/Plastic Material ,- Model: Stereo ,- Sensitivity: 100 dB/ mW ,- Volume Control: No ,- Cable Length: 1.2 m ,- Speaker Diameter: 27 mm ,- Frequency Range: 20 Hz - 20 kHz ,- Impedance: 32 Ω ,- Colour: Black/Silver ,- Line: Basic4Music ,- Recommended Use: Mobile Music/Mobile Phone 2 years legal warranty only