TP-Link Tapo T110 Smart Contact Sensor

Window/Door Safeguard – Monitors the opening & closing of windows
doors
cabinets
the fridge
or the mailbox in real time
Instant App Notification – Is your parcel locked away? Find out immediately with instant notifications
Smart Action Support – Connect the actions with other smart devices for a welcome return home
Easy Installation – Mount to nearly any surface with included 3M adhesive
Great Compatibility – Just one part of the integrated Tapo ecosystem.