Alarm Detection Systems, Inc? What, they come into my home, wave a tricorder-like device around and tell me if I have a burglar alarm or a smoke detector installed?
*beep* *beep* *beeeeeeeeeeeeeeeeeeeeeeeeep!*
"Yeah, man, I don't know if you noticed it... but according to my detector... right over there, in the hallway, above the linen closet? You've got a smoke alarm...."
"REALLY? Oh wow! I'm glad I hired you guys...."