It might be clad in JCB's eye-catching yellowlivery, but there's no hiding the fact this RCD comes from the Masterplugfactory. The test and reset buttons are set into the front of the adaptor and sensibly coloured red and orange, as with its other family members. Of the four Masterplug clones, this is the most expensive - ΂£2.50 more than the cheapest, which counts against its adequate performance.