SONOFF SenseGuard DW Gen2 Zigbee Smart Door/Window Sensor | SNZB-04PR2 SenseGuard DW Gen2 is a compact door and window contact sensor designed for versatile installation on various types of doors and windows, supporting both horizontal and vertical mounting. Powered by standard AAA batteries, it ensures cost-effective, use. The SNZB-04PR2 smart magnetic door sensor features tamper detection, sends instant app notifications, and triggers smart workflows when unauthorized removal is detected. Its sleek, lightweight design blends seamlessly into any home and enables smart automation for enhanced home security and everyday convenience. Active Security with Tamper Alerts Equipped with tamper detection. In the event of forced removal or damage, immediate alerts are sent via the app. Smart Scenes can also be triggered, such as gateway sound alarms. Smart Automation for Security and Comfort Functions as a key sensor in your smart home ecosystem. When triggered, it can start camera recording and sound and light alarms for security, or link with climate control devices to create a comfortable living environment. Sleek and Discreet Design Weighing only 45.1 g, the smart door and window sensor features a compact design that takes up minimal space and does not interfere with the operation of the door or window or the overall aesthetics of the home. Versatile Installation for Any Door or Window Supports both horizontal and vertical mounting, easily adapting to wide gaps, narrow frames, or uneven door and window structures. Affordable AAA Battery Power Powered by standard AAA batteries for easy replacement, lower maintenance costs, and up to 3 years of worry-free operation. SONOFF Smart Door and Window Sensor Compact door/window sensor with instant app notifications, easy installation, 3-year battery life, and compatibility with most doors and windows. *Zigbee gateway required. Flexible mounting to accommodate more doors and windows