This is a site transformer that steps up from 110v to 240v
The input of the transformer is by a standard 110v 16a 3 pin industrial plug that can connect to any 110v site distribution unit
The output is by a standard 13a 240v domestic socket.
The 240v output socket has a spring loaded flap cover to protect the socket from dirt and splashed water.
The construcion of the transformer is an auto type, that offers no isolation from the mains.