Elink And Railmaster Combination Pack Hornby's eLink Control Pack contains eLink interface unit, Railmaster software (also available separately as R8144) & 1Amp transformer. The DCC control system is placed between your PC and layout and is capable of controling up to 9999 locomotives and over 2000 points and electrical accessories (when connected to the relevant number of R8247 DCC Accessory Decoders). The eLink unit may be placed on or near your layout or concealed using the fixings included.