Myvu Personal Media Viewer, Sansa Edition Virtual big-screen viewing on your Sansa View video MP3 Player with a bright full-sized image that's daylight viewable Comfortable, slim see-through design with slim profile maintains natural vision of your surroundings Up to 3.5 hours viewing time using Sansa battery Comfortable, noise-reducing in-ear earbuds by Ultimate Ears provide perfect definition sound Built using SolidOptex technology for exceptional durability