Protection That Lasts: The included battery provides up to 2 years of power for round-the-clock security. Extensive Coverage: Detects motion within a 100° radius and up to 30 feet away—more than enough to secure an entire room of your home. Adjustable Sensitivity: Tailor the sensitivity of the motion sensor so that it only alerts when humans are in range—rather than your playful pet dog or cat.0 App Alerts: Notifies you as soon as motion is detected, sending a message to your phone via the eufy Security app, no matter where you are. Link it Up: Connects to eufy Security HomeBase (Not Included) and well as all other eufy Security products.