Hard-wired alarms, though, are required to have battery backup so they still work ... Similar to our First Alert combination smoke and carbon monoxide alarm mentioned earlier, this is a Precision ...

A carbon monoxide alarm is a crucial safety feature of any home, to audibly alert you of otherwise ... correct at the time of publication. Battery back-up This detector has a battery backup ...

CR's testers say these models from First Alert and Kidde are great at protecting you and your loved ones from harmCR's ...

CO alarm scoring is based on response time to lower and higher levels of CO, accuracy of digital display or voice message. Current Range of Tested Carbon Monoxide Detectors Current Range of Tested ...