Allowing North American equipment rated at 110/120 Volts to be used in the UK. Made in the UK to strict UK and EU Standards and used by Governments and Organizations worldwide where quality is paramount.
The earth pin is connected all the way through on this product. Note that some cheap imports do not connect the earth pin and this is not good practice
Our Step up and Step down transformers are technically known as Autotransformers which are single non-isolated windings that do not provide isolation between the input and output. For electrical items which may be frequency dependent please be aware that the UK supply frequency will be 50Hz. and not 60Hz. In the USA the frequency will be 60Hz. In other words the frequency is not converted by the transformer and remains as per the country that you are using the equipment