... image can be compared with storaged 20 imagesImage processingColor & B/W,Negative, Mirror, Text/Image, Brightness, Freeze, OSD menuSignal highwayYesStorage20 imagesUpperlightLEDVGA ... /MODE RECALLYeslessons softwareYesKey lockYesControl methodFront panel, Remote control and USBW×D×HSet up:215*185*460mmFolded:270*185*40mmNet Weight1.4KGPowerExternal ...