Optoma HD39Darbee offers an incredible 3,500 lumens of brightness as well as the contrast ratio of 32,000:1, you can not doubt the perfect accuracy that the device brings. With this level of brightness means you can watch it in a strong ambient light environment. This projector has no zoom ring or horizontal keystone adjustment. With long throw of this projector, you may need to make sure that you have large enough room to place Optoma HD39Darbee.