... end power module,longer work time Bluetooth: Built-in Video format:AVI,RM,RMVB,MKV,FLV,MP4,3GP ... expansion, breakpoint memory, fast forward and rewind Video subtitles:support to SMI,ASS,SSA,SRT,SUB, ... :Yes,External wireless mouse and keyboard clock,games(3D games),stopwatch(need APK to support), the desktop ... Enlish and many other languages Support to 3D games support to 4GB files,disk file system FAT ...