First Alert Hard-Wired Electrochemical/Photoelectric Smoke and Carbon Monoxide Detector

The SC7010LBLV is a state-of-the-art hardwired with a 10-year sealed lithium battery backup smoke/CO combo alarm that features a photoelectric smoke sensing chamber an electrochemical CO sensor an end of life signal and voice warning with the location. End-of-life signal - provides audible notice when alarm needs to be replaced after 10 years