The Dalite 37570LS Contour Electrol Projection Screen makes a great addition to any school room or business boardroom. It features a strong extruded aluminum case which is available in either black, white or graphite finish. When not in use, this screen easily retracts into its case which can either be mounted on a wall or in the ceiling. In addition, the screen fabric may be installed at a later date after the case is roughed in. The motor is designed to incorporate preset but adjustable limit switches which stop the screen in either up or down positions. The internal thermal overload protection system prevents burnout while the electric braking system prevents unwanted "coasting" during deployment. The Contour Electrol will flatter any installation where it is used.