First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup Overview
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- 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
*** Product Information and Prices Stored: Mar 17, 2012 07:42:20 ***