Door Alarm Window Sensors, Door Open Alarm Long Battery Life Wireless for Security Real-Time Notification WiFi Contact Sensor App Control No Monthly Fee, White (4-Pack)

Real-time notificationsWhenever a door or window is opened or closed, your phone will receive a real-time alert. When you're away, you can also use your phone to check whether the doors and windows at home are closed.
WiFi door sensor No hub needed, WiFi door sensor connects directly to your phone. Control with one tapno hub restrictions, monitor doors/windows anytime, anywhere.Simpler smart life.
Silent Alarm DesignThis sensor uses silent alerts (no local sound) and sends real-time notifications to your phoneperfect for discreet monitoring. For audible alarms, turn up your phone volume.
Long-lasting standbyThe door/window sensor comes with 2 AAA batteries, offering over a year of long standby time. When the battery is running low, it will send an alert to your phone to remind you to replace the batteries.
Compatible with "Tuya" and "Smart Life " AppNo hidden feessimply use the app to monitor your home anytime, giving you complete peace of mind.
Multi-location installationNot just doors and windowsthis device provides real-time monitoring for doors, windows, cabinets, refrigerators, mailboxes, and any other open/close items.
Easy InstallationNo tools needed! Just stick it on any surface with the included 3M tapeset up in seconds.