What kind of smoke alarm (smoke detector) should I buy? | NFPA | NFPA
Where Should Smoke Detectors Be Placed in the Home? - Bob Vila
CHZHVAN Interconnected Smoke Detector, Wireless Smoke Alarm with 10 Year Battery Life, Photoelectric Sensor Fire Alarm with Large Test Button and Low Battery Warning, Fire Detector for Home, Bedroom - Amazon.com
First Alert Battery-operated Photoelectric Sensor Smoke Detector in the Smoke Detectors department at Lowes.com