... DVD,USB, AV/USB interface high quality best price home theater,portable projector,pocket projector,micro projector,etcthey are nowdays ... 20 -150 inchProjestor distancemeter: About 3 meterLength and breadth ratio: 16:9/4:3Foucus: Manual focusWifh computer, DVD, USB, AV/USB ... interfaceHave external speaker, to restore the home theater effectCan carry mass of MP5( including PPT ) at any ...