Combination Detectors: Type - Smoke/Carbon Monoxide Detector; Detector Power - (2) AA Battery; Max Interconnect Stations - 11; Detector Operation - Photoelectric/electrochemical; Wiring Method - Wireless, RF Interconnect; Additional Information - Alarm Voice, Programmable location, Silence/Test Button; Manufacturer Series - OneLink First Alert
Additional Info: Alarm Voice, Programmable location, Silence/Test Button