Just Checking also shows when a door is used and how long it is open for.
The door sensors are made up of two parts, the contact, and the magnet. These are placed side-by-side, with one part on the edge of the door and the other on the door frame. They can be used on both internal and external doors.
Working in combination with the movement sensors, the door sensors tell you when visits have been received, when an individual leaves or enters the property, and how long the property appears to be vacant for.