Simply plug into a 13amp socket and the tester will check the following:
Reversal of live/earth connections
Non connection of either live or neutral.
Plug into a 240v/13Amp socket and get an instant readout of wiring polarity and test for earth faults.
Particularly important for touring on the continent when reversed polarity may be encountered.
Specification: 240volt AC.
For use in 13amp outlets to BS1363.