First Alert Smoke Detector Hardwire SA521CN OneLink wireless battery-

First Alert Smoke Detector Hardwire SA521CN OneLink

wireless smoke detector circuit with battery backup

Uses photoelectric sensing technology which use environmentally-friendly

battery indicator, easy to silence / test button, battery compartment

Add additional battery operated First Alert OneLink extend to wireless alarms

120-Volt with 2 AA batteries Backup

In case of fire, every second counts. When a fire started in the basement and sounded the alarm, you can not immediately when you listen to sleep on two floors. In conventional battery-operated alarms, you lose precious time waiting for the smoke to rise another alarm, on another level before the alarm sounds on the floor. But with First Alert alarms OneLink if risk is found, they all sound. This can be noticed, and increases the probability of exit

List Price: $ 75.99
Price: $ 40.00