Product name     Sennheiser M2 OEi Closed On-Ear Headphone MOMENTUM series
Warranty     2 yrs
Accessories    Carrying Case
Transducer Principle    Dynamic, Closed
Frequency Response    16 - 22,000Hz
Impedance    18Ohms
Sensitivity    112dB
Cable        1.4m 
Jack plug    3.5mm Stereo angled
Weight        6.3 oz (181g)

Package Dimension(WxHxL)     20cm x 9cm x 23.4cm