Smart 2.4G Wireless Door & Window Sensor — No Hub Required, App Control, Voice Support, Open/Close Detector

Compact Smart Door/Window Sensor with 2.4G wireless connection — installs easily and works without a hub. Monitor entry points from your phone: real-time open/close status is displayed in the App and you can use voice control while keeping activity history available. Key functions: open/close reminders and status display; 7 days of open/close records can be queried in the App. Emergency Alert Push Function ensures notifications are sent to your phone whenever a door or window is opened or closed so you can stay informed when away from home. Power Supply: built-in button battery providing 12-16 Months of operation. The App shows battery power level and issues a Low battery reminder when needed. After-sales service: please contact us if you have any questions.