Model number PRC700V; Slim profile blends easily into a home's decor; Features a photoelectric smoke sensor & electrochemical carbon monoxide sensor; Programmable talking alarm speaks to indicate the type & location of detected threat; Battery-operated unit can be installed anywhere; 1 button silences the alarm & tests the unit; Twist-lock mounting system makes installation & battery replacement easy; Wall or ceiling mount; 10-year limited warranty; Includes 2 AA batteries & mounting bracket;