12 volt motor. Power lift dome. Wall mount switch sold separately. 14-1/4" x 14-1/4" Rough opening. Extra strong galvanized steel roof flanges. Screw-in or clamp-in option. Telescopic garnish for easy trim out (sold separately). Dome color and style options- New Aerodynamic Polypropylene, white or smoke. Radius corner screen frame design. 2 piece removable screen frame.