Requires Ooma Telo internet home phone service (sold separately) Monitors windows and doors in your home, and sends phone calls, app notifications, emails, and text message alerts to your smartphone wherever you are Alerts are sent when windows and doors are opened unexpectedly, or when you've left something open and it needs to be closed When suspicious activity is detected, Ooma alerts you and gives you the option to trigger a 911 call Download the free Ooma Home Security app to check in on your home wherever you are, manage and configure sensors, and set alerts (available for iOS and Android) Easy to install on every type of door, window, or other entry point Combine with the Ooma Motion and Water sensor for complete home monitoring