This adapter allows you to use an existing power supply with the HM7000 system. The R7324 adapter enables a Hornby Power Supply Unit (PSU) to be connected directly into the Hornby power track for HM7000 fitted locomotives. This is the recommended 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. It is compatible with the following Hornby UK Power Supply units: P9100W – 1 Amp UK, P9300W - 4 Amp UK, P9600W – 1.2 Amp UK. Hornby has been a leading model railway designer in the UK for over 100 years, specializing in 00 Gauge model railway design since 1920. They offer a wide range of trains, track accessories, and scenery kits.