Dual wall and ceiling installation designAuto-locking system provides variable height settingsStandard 4-side black masking bordersMaxWhite screen material is durable and easy to clean160° wide viewing angle for commercial presentations or residential home cinemaScreen lanyard for easy operation included - allows screen's pull down handle to be reached from high areasBlack backed screen material eliminates light penetration for superior color reproductionDiagonal sizes available range from 71" - 170" in 1:1, 4:3, 16:9 and 16:10 aspect ratioOptional 6", 12", and 18" L brackets available