The Cala KNX MT CH button has a touch-sensitive button with which functions in the KNX building bus system can be called up, such as switching lights and devices, sending values, and scenes. A white LED is integrated into the touch surface, the behavior of which can be set. A temperature sensor is integrated in the Cala KNX MT CH. The device can receive an external temperature measurement via the bus and process it with its own data to create an overall temperature (mixed value). Communication objects can be linked using AND and OR logic gates. The device is supplemented with a frame from the range of switches used in the building, so it fits seamlessly into the interior design. Models: No. 70861 Cala KNX M1-T CH single button white No. 70863 Cala KNX M1-T CH single button black Delivery without frame