High Power - This screen surface provides the reflectivity and optical characteristics of a traditional glass beaded surface with the ability to clean the surface when necessary. Its smooth textured surface provides the highest gain of all front projection screen surfaces with little loss of resolution. The moderate viewing angle and its ability to reflect light back along the projection axis make this surface the best choice for situations where there is a moderate amount of ambient light and the projector is placed on a table-top or in the same horizontal viewing plane as the audience. Flame retardant and mildew resistant. Viewing Angle: 30° Gain: 2.4 - Comes standard with Silent Low Voltage Motor - Concealed-In-The-Ceiling Electric Screen with closure doors designed with the installer in mind - Handsome white case and closure doors provide a clean look and allow easy installation of ceiling tiles. - Designed to have the case installed during the ""rough-in"" stages of construction and the fabric assembly during the finish stage. - The Advantage Deluxe Case meets Underwriters Laboratories (UL) Plenum Testing Standards for use in air handling space.