HRDW SMK&CO 10Y BAT BKUP *Brand Name: First Alert *Sensor Type: Electrochemical/Ionization *Product Type: Smoke and Carbon Monoxide Detector *Batteries Included: Yes *Low Battery Indicator: Yes *Packaging Type: Clamshell *Number in Package: 1 pk *UL Listed: Yes *Test and or Reset Button: Yes *Discovery ACC, CON, NBR, SUP