Black & Decker Smoke Alarm | 5 Year Replaceable Battery | Optical Sensor

B & D Smoke Alarm | 5 Year Replaceable Battery | Optical Sensor | Low Battery Warning | Easy Install The Black+Decker Smoke alarm is ideal for hallways, landings and living areas. Powered by a replaceable battery, this alarm also features a test button, a loud 85dB alarm, a low battery warning indicator and an advanced optical sensor. Replaceable battery: Easy to replace the battery; Easy installation: Quick and hassle free setup; Low Maintenance: Reliable with minimal upkeep; Sleek, Low profile design: Discreet Look to suit any space; Fully Safety Approved: 3rd Party Approved, Meets Safety standards; Insect Proof: Reduced false alarms