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.