iDream PICO MP3/MP4 Player 4GB with FM. Image formats supported: JPEG, Video compression formats: MTV. Display diagonal: 38.1 mm (1.5 "). Internal memory: 4096 MB. Weight: 47 g. Battery technology: Lithium Polymer (LiPo), Dimensions (WxDxH): 88.9 x 6.8 x 40.6 mm, Compatible operating systems: Windows 98, ME, 2000, XP