The device is made up of two parts: a sensor and a smaller magnet. These two parts are positioned together on a closed door or window. When they are separated by more than about .5 inches (1 cm), the device alerts the Tabs app that the location is open.
Determine the ideal positions for your device. The two parts should be level and no more than .5 inches (1 cm) away from each other. See below for positioning guidance.
Put the larger adhesive pad on the sensor and the smaller adhesive pad on the magnet.
Place the sensor and the magnet in the chosen positions such that the small notch at the base of the magnet is facing the side of the sensor with the blue light.
While positioning your sensor, one of the two parts should move when the door or window is opened, and the other should remain stationary. There are many possibilities, but below are some common examples of sensor placements.