The EK-620U and EK-621W achieve the high color reproduction and high brightness 6,500 lm with blue laser light source. These models adopted the sealed optical engine design which is complete protection against dust, laser light source with 20,000 hours life, and no filter design. Therefore maintenance is muchaless demanding and it is possible to reduce the total running cost. You can install at both vertical and horizontal any angle to accomodate various places. Also 7 optional lenses and useful installation functions are suitable for digital signage, auditorium, large conference rooms, museums etc.