First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup

First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup
First Alert
$75.99
  • Hardwire, interconnected wireless smoke alarm with battery backup
  • Uses photoelectric sensing technology which is environmentally friendlier
  • Low battery warning; simple to use silence/test button; pullout battery drawer
  • Add additional battery operated First Alert ONELINK alarms to expand without wires
  • 120-volt with 2 AA battery backup
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