The Acer P1173 SVGA DLP 3D Projector provides 3000 ANSI lumens of brightness and a 13,000:1 contrast ratio for clear, bright 2D or 3D presentations - regardless of the ambient light in the room. It features SVGA 800 x 600 native resolution, a DLP chip system, and an ExtremeEco Mode that supports a long lamp life up to 10,000 hours. The P1173 can project up to a 300" diagonal image, and it features a variety of inputs that include HDMI, dual VGA terminals, dual audio jacks, and more. Other features include vertical keystone correction, optical 1.1x zoom, 2x digital zoom, a mini-USB port, RS-232 control, and a built-in 3W mono speaker. There's also an audio output jack for running the sound through an external speaker system.