Description: Security detection: Wireless door and window sensors alerts whether doors, for windows or other objects are open or closed. Provides for protection: Door and window sensors protect your home with reliable open/close detection of doors, for windows, cabinets and drawers. Ease of use: Door and window sensors are instantly notified via your smartphone or laptop when something in your home is accidentally opened. Home devices: Personalize the way your z-wave devices communicate with each other: Automatically turn on the welcome light when you open the front door at night. Trigger the siren: When the door is accidentally opened, the sensor triggers the z-wave siren, and the system does the rest, protecting your home and property. Specification: Standby current: 1uA. Battery life: 2.2 years. Operation temperature: 0-40℃. Color: white. Size: main body: approx. 7x2x2 cm/2.76x0.79x0.79 inch, deputy body: approx. 4x1x1 cm/1.57x0.39x0.39 inch. Version: 868.4MHz Note: There might be a bit color distortions due to different computer resolutions. There might be size errors due to different computer resolutions. Package Includes: 1 Piece Wireless Smart Door Window Sensor.