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First Alert Smoke Alarm is designed to provide maximum safety and security in any residential or commercial space. It features a latching alarm, ionization detection method, tamper-resistant locking pin, and visual indicators for power-on and alarm activation. With its test/retest button function, you can ensure that your smoke detector is working efficiently at all times. Easy installation allows you to mount the device on any surface with ease, while interconnectable detection capabilities let you connect up to 18 units for comprehensive protection. Its battery backup ensures continuous operation even during power outages, making it an essential safety device for every home or office. Keep your property secure and peace of mind always in place with the First Alert Smoke Alarm!