Instant Notifications*: Protect your home from leaks, waterdamage, and damage from freezing temperatures. Get notifications if water is detected or if the temperature drops below freezing. East to Set Up: Just place it anywhere you want to detect water or freezing temperatures Replaceable Battery with 2-Year Battery Life: The single repfaceable battery lasts up to 2 years. Stable Connection to HomeBase: Sub-1G connectivity ensuIres a stable connection to HomeBase 2 or 3 all around the home and yard. One App Controls All: Links to HomeBase and the eufy Seciurity app. Easily get notifications and check the battery status.