Sonoff ZigBee Wireless Door Window Sensor, Work with Alexa/ Google Assistant, Smart Scenes, Sync Status, Without Battery, White | SNZB-04-No Battery

The wireless door/window sensor is essential for knowing who is coming in and out of your home, so it is most often used as part of the smart security system. SONOFF SNZB-04 is a ZigBee two-in-one wireless door/window sensor that can be put on your door or window to tell you with an alert notification if your door or window is opened or closed, adding an extra layer of security to your home. The sensor provides you the possibility to create a scene linkage of ZigBee and Wi-Fi devices. Both the opening and closing status of the door/window is synced on your mobile phone, no longer to think back whether the door/down is off or not. It is really useful and can help you turn on or off the light in the action. Works with SONOFF ZigBee Bridge in harmony, you can set a scene to get your hallway lighted immediately when the door is opened. 

• Remind you when the door/window is open and closed. Sync the opening & closing status of door/window on APP
• Can make ZigBee and Wi-Fi devices keep linkage. Control the light with an action
• Support adding the SONOFF camera to view what happened at your home. Share control makes other users control the connected device quickly
• 3-month history records check. Low-battery notification. Simple peel and stick installation
• Battery CR2032 (3V) included. Open sensor to remove plastic insulation to energize and start the device