Description
Most 1080p projectors have vertical keystone correction only; or have 4D keystone correction(both horizontal and vertical). 4D keystone can only adjust the vertical or horizontal directions 2 choice; while the 4P Keystone Correction realizes that the 4 Angles of the picture can all be adjusted separately; more practical; convenient and user-friendly. 4P Keystone Correction makes it simple to project ideally aligned images from a variety of locations. With it; the projector can be placed off center; allowing the presenter to stand in front of the screen without blocking the image. Adjust in any direction; enjoy the freedom of simple.