Smart sensor with Wifi technology to detect open doors and windows. Product features: Wireless smart contact sensor to check closed / open windows and doors. Easy and flexible installation with adhesive tape and wireless operation. Rechargeable battery (6 months operating time per charge with 5 activations per day). Network protocol: WiFi. Product benefits: Notification when contact status changes. Records contact history. Easy control of compatible SMART+ WiFi products based on contact change . Application areas: For indoor lighting only. Technical features: A smartphone or tablet is required for control via LEDVANCE SMART+ WiFi app (from Android 4.4 or from iOS 9.0). Rechargeable battery integrated. Charging cable and installation kit included.