SITERLINK Smoke Detector, 10-Year Smoke Alarm with Photoelectric Sensor and Test-Silence Button, UL Listed Fire Alarms Smoke Detectors with LED Lights for Home, GS526A (2 Pack) -

10-YEAR LIFETIME WITH BUILT IN BATTERY: 10-year smoke detectors built in 3V lithium battery, will last 10 years, no need to replace; support to detected and notified automatically if it is low battary or error occured.

PHOTOELECTRIC SENSOR FOR ACCURATELY DETECT: Photoelectric sensor smoke alarms helps to monitor smoke and fires quickly, provides the warning of fires as soon as possible; the loudly alarm signal (Loud>85dB) helps your family keep far away from fire dangerous.

TEST/SILENCE BUTTON & LED INDICATOR: Fire alarm with test button would be activated before installation, press test button and hold it for 3 seconds until the LED light on, then release it within 2 seconds, it is activated successfully after heared “beep”; if sounds the alarm signal without fire dangerous, could push the test button to silence it for 10 hours, please clean smoke, dust or insects in it, or raplace a new one if the battary low.

EASY TO INSTALL: These smoke detectors provides mounting bracket, screws, and anchor plugs, the 3M magnet plate base are packeted together as well, convenient for you to choose different way to install it.