Kidde 20SAR Smoke Detector Photoelectric Interconnect Hardwire W/ AA Battery Backup

AA Battery Backup, Interconnectable & LED Warning Lights, model 20SAR. This smoke detector has enhanced sensing technology that reduces false alarms often caused by cooking and sends fast alerts that help give your family more time to get out safely. Plus, it is interconnected so when one alarm sounds, they all do so you never miss an emergency (see user guide for compatibility with other Kidde models).