The Presenter Pro Riser CineGrey 4D is a portable electric floor-rising projection screen with Ceiling Light Rejecting technology designed for ambient light room environments. Its tab-tension design maintains a flat and taut front projection surface to provide a ripple-free image suitable for standard long throw projectors. The ambient light rejecting characteristics allow the Presenter Pro to be used in rooms with ambient light in lecture halls, conference/boardrooms, training facilities and other environments where light cannot be controlled. The Presenter Pro Riser utilizes robust "scissor-backed" cross risers to raise and lower the CineGrey 4D material. It provides a non-invasive solution for environments where wall/ceiling installations are not practical. It includes a pair of handles on each end to allow the screen better mobility when setting up at various locations.