Smart sensor with Wi-Fi technology to detect open doors and windows. Product features: Wireless smart contact sensor for testing closed / open windows and doors. Simple and flexible installation using adhesive tape and wireless operation. Rechargeable battery (6 months operating time per charge when 5 activations per day). Network protocol: WiFi Product benefits: Notification of change in contact status. Records the history of the contact history. Easy control of compatible Smart+ WiFi products based on contact change . Applications: Only for interior lighting. Control via LEDVANCE Smart+ WiFi APP requires a smartphone or tablet (Android 4.4 or iOS 9.0 onwards). Rechargeable battery integrated. Charger cable and installation kit included.