Why choose the IN228i ? 1) Revolutionary thermal design.2) Removable dusty-proof filter (Optional). 3) Easy to use connectivity. 4) High brightness. 5) High contrast ratio. 6) 3D technology supports up tp 120 Hz frame rate. 7) Compact design and weighs only 2.35 kg. 8) Accurate and vivid color reproduction with Brilliant Color technology. High efficient cooling system: New designed structure with vertical positioned main broad creates a straight and wide air passage. Assisted by strong and robust cooling fans, times the volume of input air comparing to traditional design generates very high efficient cooling effect.3D Support: By using DDP4421 platform, IN228i can support full 3D display. Combining with their brightness and contrast ratio, the two models deliver an extraordinary 3D experience at a very affordable cost. Extra Intensive dust Proof: Besides sealed optic engine to provide best dusty prevention, a pair of removable dust proof filters is installed at the air intake to provide extra protection from dust, which is easy to take off and clean. High cost Efficiency: Not only affordable prices deliver benefits to our customers, but also helped by the new designed cooling and dusty proof systems, IN22Xi series products have longer life time and default free performance, which lower down keeping and operating cost. Native Resolution : SVGA,Display Technology : DLP 0.55"D DP4421, Color Wheel : 6 Segment, Projection Lens : 2.41 (wide)~2.55(tele), Uniformity : 80%, Throw Ratio : 1.95~2.15, Throw Distance: 1.2 m to 12 m, Zoom Ratio : 1.1x, Noise : 32db ( normal) / 29db ( eco ), Input : VGA- in*1, mini USB, Control : RS232, Lamp : 190 W, Lamp Life : 5000 Hrs ( Normal) / 6000 Hrs (Eco), Standby : <0.5W, Power Consumption : 225W bright mode/ 191W eco mode, Power Supply : 100~240V AC @ 50~60 HZ, Standard Accessories : User Manual (CD), Safety/ Reg card, VGA cable (1.8M), Power Cord ( 1.8M), Remote Control.