I ordered this for an aunt with Dementia that likes to walk out doors when she knows you aren't looking. I read the instructions, installed the unit on the front door, and it works beautifully. Unfortunately the remote didn't work. The instructions said it came paired already, but it wasn't. Once I paired it, no more issues. I keep the directions, and recommend you do too! I had the main controllers buttons accidentally pushed and had to reprogram the door alarm and change it from chime to alarm. It's easy and works perfectly for my needs.