u::Lux Switch dS AddOn CO2 and temperature and humidity measuring module. Immediately after connection, a wide range of standard functions can be operated via the u::Lux Switch dS. These can be individually configured using the digitalSTROM u::Lux Server app. The u::Lux AddOn CO2+RH+TEMP is a CO2 measuring module with an integrated humidity and temperature measuring module including cover panel and fastening material. The AddOn is connected directly to the lower part of the u::Lux Switch using an approx. 25cm long 4-pin cable (included in delivery). A double frame is required for the switch set including AddOn.