S4225MB is a CCT controller embedded with EEPROMmemory cells, which can storage the state afterpowering off. It sets a state-switching-window time Tsw(internal timing, Typ 6.4S).Turning on the light within ashort time after turning off it, if the OFF time is less thanTsw , the light will transfer to the next CCT state;Otherwise the light will display the CCT state beforepowering off. It is very convenient to use.