
This6-pack hardwired First Warning smoke alarm comes with a 9 volt battery to shield you from power failure. A smoke ionizing sensor and a fast burning fire, and a loud, 85 dezibel warning are featured on the detector. One button stops the alarm and checks the role of the detector, while the lights show whether the alarm detects smoke, too. Even when the warning conditions have subsided, the locking alarm indicator automatically identifies which unit triggered the alarm. And an end of life warning will boost your protection by letting you know when the device will be replaced.