The Hornby Select and Elite units are capable of having connected to them up to 7 Select Walkabout units. The addition of these units to the Select and the Elite does provide independent control of up to 8 locomotives providing electrical power is available.
Using the Walkabout units in this way makes it also possible that a locomotive can be passed from one controller to the next and then the next in much the same way as a full size train is handled on the main line as it passes from one section to the next.
Connecting and operating additional locomotives with a Select Walkabout is as easy as 1,2,3!