1. Tap on your alarm on the front page.

2. Tap on "Accessories".

3. Tap the plus sign in the top right corner.

4. Remove the plastic protection from the sensor.

5. On the side of the motion detector, push the black button up and then wave your hand in front of the sensor until Guardian says 2 beeps.

6. Tap "Confirm" when you hear the beeps, and your sensor is now connected.