I called Mr. Electric because they are recommended in our HOA handbook. I had, what I thought was, a smoke alarm about to go down in flames! That anxiety producing beeping, every 30 seconds, was making the cat and me crazy! Kelly answered the phone and within 5 minutes had Zak on his way to my house. Turned out I was hearing the dying gasps of a carbon monoxide detector, that was plugged in near the suspected smoke detector. Zak figured it out in just a couple of minutes. My hero!