TP-Link Tapo T110 Smart Contact Sensor for Doors & Windows

Real-Time Monitor- Check the status of your windows and doors anytime, anywhere.Instant Notification- Is your parcel locked away? Find out immediately with instant notifications.Home Automation-Create a smart action to automate your smart devices, such as light bulbs, smart plugs, and more.Easy Installation- Mount to nearly any surface with included 3M adhesive.2-Year BatteryLife- Equipped with a CR2032 battery for long-lasting power.