The Floor Riser Pro CineGrey 4D Series is a portable ceiling ambient light rejecting pull-up projector screen. It is the ideal screen for rooms that have limited or no control of incidental light such as family rooms, lecture halls, boardrooms or training facilities. It features a detachable telescoping support bar which allows the screen to be stopped at any position to accommodate various height requirements. The tab-tension design maintains the projection surface taut and flat to produce ripple-free presentations.