[0:02] ever hear a beep somewhere in your house [0:06] is it coming from a smoke alarm [0:10] smoke alarms use their chirp to let you [0:12] know something is wrong one chirp could [0:15] mean it has a low battery three chirps [0:18] can indicate a malfunction five chirps [0:21] usually means that a smoke alarm is at [0:23] the end of its lifespan make sure to [0:26] test your alarms monthly and replace the [0:28] alarms every 10 years if it's a [0:31] combination smoke and carbon monoxide [0:34] detector they typically only last 5 to [0:37] seven years