Smart sensor with Wifi technology to detect open doors and windows. Product features: Wireless smart contact sensor for checking closed/open windows and doors. Easy and flexible installation with adhesive tape and wireless operation. Rechargeable battery (6 months of use per charge with 5 activations per day). Network protocol: WiFi. Product benefits: Notification when the contact status changes. Records contact history history. Easy control of compatible SMART+ WiFi products based on contact change. Areas of application: Only for interior lighting. Technical equipment: A smartphone or tablet (Android 4.4 or higher or iOS 9.0 or higher) is required for control via the LEDVANCE SMART+ WiFi app. Integrated rechargeable battery. Charging cable and installation kit included.