The R7324 adapter enables a Hornby Power Supply Unit (PSU) to be connected directly into the Hornby power track for HM7000 fitted locomotives.Please note, this is the recommend method of supplying power to the track for the HM7000 system.The adapter is designed to fit 00 scale R8241 and Hornby TT:120 TT8029 digital power tracks, and is compatible with the following Hornby Power Supply units:P9100W 1 Amp UKP9101W 1 Amp EuroP9102W 1 Amp AUSP9103W 1 Amp USP9300W - 4 Amp UKP9301W 4 Amp EuroP9302W 4 Amp AUSP9303W 4 Amp USP9600W 1.2 Amp UKP9601W 1.2 Amp EuroP9602W 1.2 Amp AUSP9603W - 1.2 Amp US