u::Lux Switch dS AddOn temperature and humidity measuring module including cover panel and fastening material. 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 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.