Model B® with CSR... Offered exclusively by Da-Lite, the Controlled Screen Return (CSR) system adds an impressive feature to the ever-popular Model B design. The CSR system ensures the quiet controlled return of the screen into the case providing optimal performance and smooth, consistent operation. Screens with the CSR feature must be fully extended. There are not intermediate stopping positions. High Contrast Matte White: Designed for moderate output DLP and LCD projectors. This screen surface is a great choice when video images are the main source of information being projected and where ambient light is moderately controlled. With its specially designed gray base material and reflective top surface, this screen material is able to provide very good black levels without sacrificing the white level output. Flame retardant and mildew resistant. Viewing Angle: 50° Gain: 1.1