This is the one. https://www.gira.com/en/gebaeudetechnik/systeme/knx-eib_system/knx-produkte/bediengeraete/praesenzmelder-mini.html https://www.gira.com/en/geb

This is the one. https://www.gira.com/en/gebaeudetechnik/systeme/knx-eib_system/knx-produkte/bediengeraete/praesenzmelder-mini.html https://www.gira.com/en/gebaeudetechnik/systeme/knx-eib_syst... You can see what one looks like in place here in the middle of this picture. I use black ones for my wood ceilings. https://i.imgur.com/pTCOKJx.png https://i.imgur.com/pTCOKJx.png On the left hand side is one of the air quality sensors.