Lamp Life:up to 30,000 hours Throw Ratio:1.42-1.72 Screen Size:60-250 inch Dimension(L*D*H):28*24*8.5cm Projection Mode:front rear, floor ceiling Power Supply:AC100-240V, 50-60HZ, 1.5A Projection Ways:Front Rear Ceiling Desk Screen Mode:4:3(Default) Optional 16:9 Patent Optical Engine:Full Sealed & Dustproof Contrast Ratio:50,000 1