Prepare your door. Make sure you lock is installed on your door and that your door is all the way open. If you have a deadbolt, make sure it is in the locked potion. If you have a knob or lever, make sure it is in the...
Ensure that the Sound switch is in the ON position. The Sound switch is the third switch from the left.
The batteries should last at least 12 months with normal use.
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