Da-Lite 29746E is designed for large venues, the Wireline uses thin steel cables up to 29 feet instead of black drop to lower the screen to an appropriate viewing height for a clean, aesthetically pleasing presentation. The Wireline™ Advantage® screen features simple in-ceiling installation with sliding brackets and ceiling trim built into the housing. The extra step of concealing the rough opening with ceiling trim is eliminated. Sliding installation brackets make it easy to attach the screen housing to the structure above the drop ceiling. Advantage® tensioned screens ensure the smoothest surface possible for high quality image projection.