The 21786, by Da-Lite, is made for larger venue installs, the Tensioned Large Advantage¨ Deluxe Electrol¨ is designed to eliminate the extra step of finishing the screen with trim. The Advantage line of projection screens is designed with ceilin…g trim already in place. Once the screen is installed, the screenÕs trim conceals the rough opening eliminating the need to complete additional trim work. Sliding installation brackets make it easy to attach the screen housing to the structure above the drop ceiling. Tensioned screens ensure the smoothest surface possible, and all Deluxe screens feature a closure door that hides the open space and screen in the ceiling, providing a cleaner aesthetic. The screen features simple in ceiling installation that can be done in two stages. The screen case can be installed during the rough-in construction stage and the fabric assembly can be completed during the finishing stage.Product Features:Standard Low Voltage Control (LVC) to keep your screen operation flexibleSmooth Roll Technology to keep your screen perfectly flatSlim-Tab, a lower profile and stronger tab design to keep your screen perfectly taut