First Alert SMI100 Battery-Operated Smoke Alarm Charlotte Pipe Ultraviolet (UV) light inhibitors have

Ultraviolet (UV) light inhibitors have been added to prevent degradation

For bedroom and bathroom doors

Multimeter measures up to 600V AC/DC voltage

hardened steel with precision-ground stripping holes

First Alert SMI100 Battery-Operated Smoke Alarm Charlotte Pipe Ultraviolet (UV) light inhibitors haveThe First Alert SMI100 Battery Operated Smoke Alarm is available in a convenient two pack. The SMI100 smoke detector is equipped with First Alert's Precision Detection advanced sensing technology and meets new industry standards. This battery operated alarm is easy to install and the front access battery compartment makes for easy battery replacements. First Alert's Precision Detection advanced sensing technology complies with new industry standards