Gain 1.1, visual angle of 160 degrees, with a good color reduction, large field of view, soft light, long time to watch the fatigue, the advantages of long life, suitable for home and commercial use, the most widely used, the price is also the most economic. Commercial projector 2000 lumens and above or above home projector 1000 lumens recommended to buy. Is also widely used in engineering projects, outdoor occasions, KTV, etc..