Window and door contact sensors for the WeatherHub SmartHome system. Designed for operation with the gateway (sold separately). Set of 3 for monitoring windows and doors. Available with white or brown covers. Push notification when a window or door is opened, as well as an overview of open doors or windows at a glance. Data can be accessed anytime via smartphone. TFA Dostmann is one of the leading companies in the industry in Europe, offering over 1000 weather and measuring instruments. The product range is characterized by innovative technologies and exclusive designs, continuously developed in collaboration with meteorologists, IT specialists, and designers.