Ltpgtltspan stylequotcolor ff0000quotgtslave unit ampndash this requires a master switch in the same circuit to function so is only for use in two way or multi way circuits used in conjunction with a v pro master switch this will not function as a standalone dimmerltspangtltpgtltpgtthe varilight v pro series comprises programmable intelligent dimmers with a choice of dimming modes for wider compatibility some have a push onpush off switch action with rotar