SITERWELL SITERLINK Smoke Detectors Battery Operated, Smoke Alarm with Test-Silence Button, Photoelectric Sensor Fire Alarms Smoke Detecto

10-Year Lifetime with 1-year 9V replaceable BatterySITERLINK battery powered smoke detectors will last 10 years the device includes one year 9V battery, easy to replace it support to detected and notified automatically if it is low battary or error occured hotoelectric Sensor for Accurately Detecthotoelectric 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 and LED Lightsire alarm with test button would be tested weekly by pushing the test button then holding it down at least 5 seconds if sounds the alarm signal without fire dangerous, could push the test button to silence it for 10 minutes, please clean smoke, dust or insects in it, or raplace a new one if the battary low Easy to InstallSITERLINK 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 High Quality and Friendly customer SupportSITERLINK smoke alarms built with first-class fire-retardan Pc plastic material, tested strictly before being sold in the market any issue, please contact us, we will help you find a solution