Keep a single motor electric screen under precise control with a low-voltage interface built for AV rooms that need dependable operation. The Da-Lite 40973 is designed for installations where screen movement must be triggered cleanly from a control system or wall station, reducing the need for manual operation and keeping the room presentation-ready. This controller fits naturally into conference rooms, classrooms, and training spaces where screen deployment needs to be consistent from one session to the next. By focusing on a single motor screen, it avoids unnecessary complexity and gives integrators a direct control path for one display surface. That makes it a practical choice when reliability matters more than feature overload. For teams standardizing room control, this model supports a cleaner install and a more predictable user experience. It is a purpose-built accessory for Da-Lite electric screens, helping preserve the value of the projection system by keeping operation simple, repeatable, and easy to support over time.