Take your favourite music with you. Stereo headphones with built-in MP3 player which requires an SD/SDHC memory card (sold separately). By activating the noise cancellation, you can reduce background noise from traffic, trains, work sites, etc. Comes with 1.4 m cord with a 3.5 mm stereo plug and 6.3 mm adaptor, USB cable and airline adaptor. Built-in rechargeable battery for up to 10 hours of playback.