The CXL-80T is an internal 80W - 70/100V transformer which can be added to the non-T versions of the 46-80 Series to provide 70/100V output from a single zone (or any number of zones) to a maximum of four.? Fitting and connection is very simple and can be retro-applied to the non-T versions of the 46-80 to provide 70/100V output options.