Sennheiser OMX80 Sport Series II Stereo Earbud Clip On Headphones (Discontinued by Manufacturer) Flexible Ear Hook for a secure fit during Sports Sennheiser BassWind produces clear, deep , rich bass. Sweat Proof Coating wicks mositure away enhancing fit and durablity Compatiblity with nearly every audio device with a 1/8 inch connector 2 year parts and labor warranty