Specifications:br Imaging technology: TFT LCDbr Resolution: 480*272br Support the highest resolution: 1 920*1080br Light source: LEDbr Focus: manualbr Projection distance: 15---2.5Mbr Projection ratio: 1.5:1br Screen ratio: 16:9br Power supply: adapter: 12V-2.5Abr Input interface: HD*1USB2.0*1Micro SDAVbr Output interface: earphonebr Projection method: front projectionbr Color: yellow, white, blackbr Specifications: American Standard English, European Standard English, British Standard English, Australian Standard Englishbr br Style:br A: Normal version, cannot connect to mobile phonebr B: Mobile phone with screen versionbr br style c：yellow A US +USB 1.