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.