First AlertFirst Alert Atom Micro Photoelectric Smoke and Fire Alarm;

Packing all the power of an advanced photoelectric smoke alarm into a streamlined, miniature design, the First Alert Atom Smoke and Fire Alarms ensure maximum protection in a micro design. The optical photoelectric sensing technology provides accurate detection and reduces nuisance alarms from cooking smoke or shower steam. The micro design at just 1.87" diameter is 62% smaller than standard alarms - making them more stylish and less obtrusive on ceilings and walls. The alarms include a long-life 3V Duracell lithium battery to ensure continuous power for over one year without replacement. The alarms feature an 85dB audible alarm with flashing LED and a convenient dual function test/silence button to control that function. Alarm are easy to install -simply attach mounting bracket to wall or ceiling and twist alarm to lock in place. The SmartclipTM safe mount system prevents the installation of the alarm without the battery - so you can ensure the alarm has power before mounting. Sold in a convenient 3 pack for best placement throughout the home. Alarms are backed by 10 Year Warranty.