... problem, you can easily transfer MP3s, MP4s, music, video, photos or other files from your PC to your cellphone ... camera, PDA, MP3 player, MP4 player, videogame player) battery charger. Such an absolutely useful product in such a wonderfullly small ... Function: Emergency cellphone battery chargerDevices Supported: MP3 player, MP4 player, Digital Camera, PDA, Hand-held Video GamesPower: Built-in ...