First Alert SA302CN Dual System Smoke Detector with Remote Testing Function

The First Alert Dual System Smoke Detector comes with both photoelectric and ionization sensors to detect flame or smoke conditions in one powerful alarm. With intelligent sensing technology, this alarm is designed to recognize the difference between non-threatening conditions and real emergencies. It is effective at detecting both slow, smoldering fires and fast, flaming fires. A loud 85-decibel alarm alerts you to smoke or fire. Also the alarm's microprocessor technology automatically runs daily self-check tests on every smoke alarm function (does not test horn) to assure you that it's working properly. Silencing and testing functions can be run by most household remote controls such as the ones used for the television, stereo, and VHS or DVD players, eliminating the need to reach the ceiling. Uses one 9-volt Battery (included).