Da-Lite’s 34524BL is designed to eliminate the extra step of finishing the screen with trim, the Advantage line of projection screens is designed with ceiling trim already in place. Once the screen is installed, the screenÕs trim conceals the ro…ugh 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. The Advantage Electrol 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. The Advantage Electrol does not include the automatic closure door or the Tensioning Cable System. See Tensioned Advantage Electrol for Tensioning Cable System or Tensioned Advantage Deluxe Electrol for both the Tensioning Cable System and the additional aesthetic of the automatic closure door.Product Features:Advantage Electrol 87″ x 139″ Projection Screen, Box OnlyStandard Silent Drive System to keep your screen whisper quiet (sizes up to 10Õx10Õ)Standard Low Voltage Control (LVC) to keep your screen operation flexible