It comes with a decent length coiled cord.
Dave
Lackawanna Route of the Phoebe Snow
Jim:
As Phoebe noted the UT4 comes with a coiled cable. It will comfortably reach about 5 feet. It is not detachable from the throttle. Tony's Trains (http://www.tonystrains.com) sells six wire cables and couplers that could be used to lengthen the cord or you could add additional UP5 panels around the layout to extend your reach.
Joe