iDream PREMIO MP3/MP4 Player 4GB FM DRM. Image formats supported: JPEG, BMP, Video compression formats: SMV, Audio formats supported: MP1, MP2, MP3, WMA, WMV, ASF, WAV. Display: CSTN, Display diagonal: 38.1 mm (1.5 "). Internal memory: 4096 MB. Weight: 41 g. Battery technology: Lithium Polymer (LiPo), Playtime internal battery: 5.5 h, Dimensions (WxDxH): 74.5 x 14 x 41 mm