Smart window handle for retrofitting on PVC and timber windows. Replaces lockable handles and solves the problem of keys (protruding, lost) with today’s lockable handles. With the elegant appearance, it combines security, comfortable handling and design in a single solution. Locking and unlocking is comfortably done via app and includes monitoring and visualization of handle positions. Additional functions include, for example, individual or collective control of the handles or the setup of Leaving- or Coming-Home scenarios. The creation of time profiles and a practical remote function for on the go also ensures operating convenience and security. By incorporating the product into existing smart home systems and pairing it with other Matter-enabled products, end users also gain access to a variety of other possible functions, such as improving a building’s energy efficiency: as soon as a window is opened, the smart thermostat turns down the radiator in the room.