... brings.(1) Signal compatibility:HDMI,S-Video ,TV, VGA (PC), Video, Audio input and output ,Y/PB/PR ... ) Keystone correction, the picture aspect ratio can switch from 16:9 to 4:3.(3) OSD ... inches (in Diagonal)InterfaceVideo, Y/PB/PR, S-video, VGA, TV, HDMIVideo SystemPAL /NTSCAudio Output2 built-in ... projector, for easy installation)1- Composite video cable (yellow) and Audio cables (white, red) (can be ...