The GAUGEMASTER DCC80 Autofrog Digital Frog Polarity Switches are a set of multi-coloured power supply units designed for model railways. Made by the UK-based brand Gaugemaster, these digital polarity switches are compatible with DC power supplies. These switches provide an efficient and convenient way to control the polarity of the frog switches on your model railway layout, ensuring smooth and reliable operation of your trains. Perfect for collectors and enthusiasts looking to enhance their railway setup with digital technology.