I have a large Da-Lite Brand Projection Screen. It is the Cosmopolitan Electrol electric Wall or Ceiling mount Screen.
Below is the info from the website. Feel Free to Ask Questions!
The Cosmopolitan® is a ceiling or wall mounted electric screen.
Two-piece aluminum case with mounting brackets for wall or ceiling mount installation on 188" Diagonal and over
Decora-style, three-position wall switch
Standard white powder-coated housing finish; available in black upon request
Standard black backing retains projected brightness on front projection surfaces