Top Hang type Sliding Automatic door opener is typically installed on the door frame or the wall near the door, and it is connected to the door itself using a mechanism such as a sliding track. When activated, the automatic door opener will open the door and hold it open for a set period of time before closing it again. Normally it will be equipped with various safety features such as motion sensors or obstacle detection systems that help to prevent accidents or injuries caused by doors closing on individuals.