7-Day Digital Timer, 24VAlso known as: G26DGI16 7 Day Timer Used to automatically open or close a door at pre programmed times. Includes manual override and battery back up. Not for use with Solid State Logic Control Board (L). WARNING: Automatic door operation can cause serious injury or death. Do not use this device without entrapment protection equipment, audible visible warning devices, clearly posted warning signs, and an emergency STOP button near the door.