Attractive and Big LCD Display KNX smart inerface with IOT devices VOC CO2, HCHO sensor Detection Modbus o Bacnet / KNX communication Multiple modes control(Manual,Economy and PRG. Mode) Fan coil system or floor heating system Heat Mode & Cold Mode 3-speed fan control or EC fan control 7 days Programmable (4periods/day) RS485/Modbus  ( ODM service)  Clock display Frost protection Child Lock   CE, ROHS, RED