The current BTicino 2-wire video door entry system can be replaced by the Classe 300 EOS: - Single-family or single-family home or two-family home: replacement without modifying the video door entry system wiring - Residential community or multi-family home: for each Classe 300EOS with Netatmo, a specific power supply unit must be added (art. 346020). Please refer to the General installation rules of the 2-wire system technical guide.