BenQ SH910 4000L Cinema Class HD DLP Projector 4000 ANSI Lumens Ultra-High Brightness Full HD 1080p Magnificence 3000:1 High Contrast Ratio LAN Control Projector Management USB Display LAN Display Wireless Display1.5x Big Zoom Ratio Built-In 20W Big Audio PowerSRS-Certified for Quality Audio Lens: F 2.41 - 2.91 (f = 20.72 - 31 mm)Zoom Ratio: 1.5x Throw Ratio: 1.4 - 2.1:1 (65" @ 2 m)Projection Size: 24 - 300" / 609.60 - 7620.00 mm Keystone Correction Vertical: +/- 20 Degree Ceiling Mountable Yes Rear Screen Projection Yes Built-in Speaker 20W 2x 15-pin VGA Video (Input)1x 15-pin VGA Video (Output)1x HDMI Audio/Video (Input)1x RCA Composite Video (Input)1x S-Video Video (Input)2x 1/8" (3.5 mm) Mini Audio (Input)2x RCA Stereo (L/R) Audio (Input) 1x 1/8" (3.5 mm) Mini Audio (Output)1x Ethernet Control/Service (Input)1x USB Type-B Female (Input)1x USB Type-B Female (Input)1x Mini-USB Type-B Female (Input)1x RS-232C Control/Service (Input/Output)1x 1/8" (3.5 mm) Mini Microphone (Input) Full HD 1080p resolution 4000 ANSI Lumen Ultra-high Brightness Ultra high contrast ratio of 3000:1 LAN Control Centralized Projector Management 1.5x Big Zoom Ratio for Enhanced Installation Flexibility Built-in 20W Big Audio Power SRS-Certified for Quality Audio Performance ecoFACTS Label