- How are reviewers describing this item?
good, fat and level.
- Our engine has discovered that over 90% high quality reviews are present.
- This product had a total of 16 reviews as of our last analysis date on Feb 20 2018.
The square box is the control unit which accepts the included cr2032 coin cell battery with each unit
The battery is installed flat or positive side up and you should hear a beep if it is seated correctly (the door will close even if the battery isn't properly seated, but the unit won't turn on)