We are offering lcos projector is the combination of both dlp & lcd technology. Light is reflected by liquid crystals instead of individual mirrors. Here the liquid crystals are applied to a reflective mirror substrate. With the closing and opening of liquid crystals the light is either reflected from the mirror below, or blocked. This modulates the light and creates the image. specifications : illumination : 3000 lumens to 4000 lumenscontrast ratio : 900 1 to 1000:1resolution : sxga 1400x1050aspect ratio : 4:3 /16:9lamp life : 2000 hrs to 3000 hrs.