Manual B Series Elite Screens Manual B series is a great choice as an entry-level projection screen at a budget-friendly. This series features Elite Screens' 1.0 gain, MaxWhite B front projection screen material. This 4K Ultra HD ready material not only provides a 180 deg. viewing angle with perfect diffusion uniformity but also retains precise definition, image color reproduction, and black/white contrast for a beautifully crisp picture. The screen is rolled in a sturdy steel case that can easily flush mount to your wall or hangs your ceiling or brackets (sold separately). Manual B series features an auto-locking system that gives you control of height settings, providing a variety of aspect ratios and a secure return to its case via the slow retract mechanism - All of these features make the Manual B series a great choice selection! *Manual B series is not recommended for Short Throw or Ultra-Short Throw Projectors*