this device do nothing to live up to the description or previous review . First of all , if you want to use HDMI , you be stick with 4:3 ratio , so no widescreen movie or computer image . next , the keystone be extremely limit , so you have to have the unit sit almost perfectly level to you projection screen . also , the image be 100 % dependent on be in a very dark room . any ambient light from window or open doorway really affect the quality . finally , any video playback be poor due to a hard-to-focus picture and seemingly jerky movement . I unbox , test , and rebox this unit for return in about a hour .