Multi-Function Sensor: This 8-in-1 sensor can be used as a door sensor to detect Open/Close or for Motion Detection; please note this is an add-on sensor that is compatible with Arlo Home Security System SS1201 or SS1501 (sold separately) Smoke Detector Listening: Additionally, our All-in-One Sensor features Open/Close Detection, Tilt Detection, and Light Detection; plus, get Smoke/CO Alarm Listening with the Arlo Professional Monitoring plan after trial Leak & Freeze Alerts: Equipped with Water Leak Detection and Freeze Detection capabilities, this sensor helps safeguard your home from water damage and frozen pipes, ensuring your peace of mind Smart Home Integration: Connects seamlessly with the Arlo Home Security System for burglar alarm functionality and more; manage your home surveillance from the Arlo Secure App with easy setup Arlo Secure Plan Trial: Premium features like 30-Day Video Cloud Storage; Object Detection; Professional Monitoring; 24/7 Emergency Response; Arlo Safe, and more require a paid subscription after trial