This WMC-NW20MU USB cable is used to transfer music, pictures, data between your Sony Walkman video MP3 player and PC by USB port. While transfering data to your mp3 player, it can also charge the mp3 player at the same time. It works with but not limited (check product manual) to the following Sony Walkman models: NW-A80X, NW-A800, NW-A805, NW-A806, NW-A808, NW-A808S, NW-A810, NW-A820, NW-A916, NW-A918, NW-A919, NW-S603, NW-S605, NW-S615, NW-S616F, NW-S703F, NW-S705F, NW-S706F, NW-S715F, NW-S716F, NWZ-S610, NWZ-A720, NWZ-A726, NWZ-A728, NWZ-A729, NWZ-A800, NWZ-A810, NWZ-A815, NWZ-A816, NWZ-A818, NWZ-A820 NWZ-A826, NWZ-A828, NWZ-A828K, NWZ-A829, NWZ-A839, NWZ-A845, NWZ-A916, NWZ-A918, NWZ-A919, NWZ-E435F, NWZ-E436F, NWZ-E438F, NWZ-E439, NWZ-E440, NWZ-E443, NWZ-E443F, NWZ-E444, NWZ-E445, NWZ-S510, NWZ-S515, NWZ-S516, NWZ-S518, NWZ-S540, NWZ-S544, NWZ-S545, NWZ-610F, NWZ-S615F, NWZ-S616F, NWZ-S618F, NWZ-S630, NWZ-S636F, NWZ-S638F, NWZ-S639F, NWZ-S640F, NWZ-S644F, NWZ-S645F, NWZ-S710F, NWZ-S716F, NWZ-S718F, NWZ-S730F, NWZ-S736F, NWZ-S738F, NWZ-S739F, NWZ-S740F, NWZ-S744F, NWZ-S745F, NWZ-X1050 NWZ-X1060 MP3 Players. This replacement WMC-NW20MU USB charger/data cable plugs straight into your Sony MP3 Player like the OEM original cable. It provides USB Data Access via your PC/Mac, Synch charging and can also be used with a USB wall charger (not included). Precision connectors and Twisted-Pair construction to ensure high-speed (up to 480 Mbits/sec) and error-free date transfer. 3 Year Replacement Warranty. MPF Products is a Registered Trademark.