No one tells you what those different beeps or on-off lights on your smoke detector mean. Here's what you need to know.

Heather Fenner received a bed shaker and strobe light alarm this week, installed by the Red Cross for free and specifically ...

Each home security system has its own set of cues and meanings, and you'll need to consult with your manual to work them out. There are, however, a few universal warning sounds used for most household ...