The Model C with CSR is a manual wall or ceiling mounted screen with Da-Lite's Controlled Screen Return (CSR).Offered exclusively by Da-Lite, the Controlled Screen Return (CSR) system adds an impressive feature to the Model C 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.Provides great performance and smooth operation.