... Optional) FunctionBasicAV-In or bluetooth for optional.othersTouch screen,MP3/MP4,Photo Viewer,Mini Games,Calender, Calculator, E-book(txt.), ... ,Sleep keyContrast:AdjustableBacklight:Adjustable Software:Operating System(O/S)Windows CE 6.0Infurce LanguageMulti-Language,more than 30 kinds of ... 0 High Speed for Data Interface Support File Format:Video PlayerRMVB,MP4, MPEG4,WMV,AVI,ASF,MOV,FLV,3GP,etc. ...