Remove the alarm from the base by rotating it counterclockwise.
Insert three AA batteries into the back of the unit.
Choose an appropriate location for the alarm. Never install the alarm in a corner. Wall corners and the corners where ceilings meet walls are dead air space.
Hold the mounting plate up to the location and mark the two mounting holes.
Drill pilot holes into the marked areas with a drill and an appropriately sized drill bit.
Hammer the included anchors into the two drilled holes.
Attach the mounting plate to the location with the included screws.
Attach the alarm to the mounting plate by rotating it onto the groove clockwise.
Press the 'Test" button to ensure that the alarm is working properly.
Replace the batteries every 7 years.