1: 72 inch wireless virtual display 2:16:9Widescreen display 3.3-4 hours for working time 4.built-in 4 GB 72 inch wireless virtual display 4GB 3D video glasses with AV IN Function DescriptionVirtual size72inches virtual screen16:9(at 2m distance)Video formatdisplay movies, photos, e-book,support MPEG, AVI, RM, RMVB,MOV,MKV,VOB,DAT,MP4Audio formatdisplay music,support MP3, WMA, FLAC, APE, AAC, and ...