Secure more entry points in your home. These add-on accessories integrate seamlessly with your existing Defiant Smart Security System. When installed with the magnet within 1.2 inches of the sensor, any door or window opening triggers an instant notification to your smartphone through the Hubspace app. When your system is armed, opened entry points will sound the alarm to alert you of potential security breaches. The convenient bypass feature allows you to temporarily deactivate individual sensors by pressing the sensor front cover. This 1-minute bypass lets you open a door or window without triggering the alarm. If the bypass expires while the door/window remains open, the sensor returns to active monitoring. Installation is simple and tool-free with included adhesive tape, or screws for permanent mounting. The compact, low-profile design blends seamlessly with door/window frames. Each sensor is powered by a single CR2032 battery (included) with an expected 2-year battery life. The Hubspace app monitors battery levels and alerts you when replacement is needed. An anti-tamper mechanism sends immediate notifications if a sensor is removed from its bracket, and will trigger the alarm if the system is armed. From the Hubspace app, you can arm and disarm your system, manage access PINs, review activity history, and customize alarm settings. Compatible with Amazon Alexa and Google Assistant. Requires Defiant Smart Security System Base Station (SKU# 1001853211, sold separately).