GS528A Battery Operated Photoelectric Smoke Alarm

10-Year Lifetime with 1-year 9V Replaceable Battery: Smoke detectors last 10 years and come with a one-year 9V battery. They automatically detect and notify low battery or errors.Photoelectric Sensor for Accurately Detect: Photoelectric sensor smoke alarms help to monitor smoke and fires quickly and provide a warning of fires as soon as possible.Easy to Install: The detectors include a mounting bracket, screws, anchor plugs, and a 3M magnet plate base. Installation options are convenient and flexible.