First Alert Hardwired Ionization Interconnectable Smoke Alarm Cinsa Includes one each: 3/8 In

Includes one each: 3/8 In

corner sanding

With interchangeable bearings to cut rabbets of different depths

Compact design for working in tight spaces

Die-cast body with short blade

First Alert Hardwired Ionization Interconnectable Smoke Alarm Cinsa Includes one each: 3/8 InThe SMI100 AC hardwired interconnect smoke alarm with battery backup meets industry standards utilizing First Alert's Precision Detection advance sensing technology. Precision Detection provides advanced protection early warning as well as a reduced number of nuisance cooking alerts. This hardwire smoke alarm is easy to install and replace existing alarms with no need to rewire. Plus interconnect compatible alarms to create a whole home alarm system