If you hear the device beeping intermittently, it indicates that the batteries need replacement.

1. Find the arrow indicator that points to where the device slides off the base plate.
2. Using a small FLAT HEAD screwdriver, gently pry open the device to remove the electronics from the housing.
3. Replace the old batteries with two new AAA batteries.
4. Put the electronics back into the housing until you hear it click.
5. Carefully slide the device back into the base plate.