Introducing the Martindale advanced socket, earth loop, and RCD testers, perfect for non-trip earth loop impedance tests, L-NE reversal checks, and RCD trip assessments. This model comes equipped with valuable extras such as audible indication, a dedicated polarity swap touch test, and a 30mA RCD trip check for enhanced safety and efficiency in electrical testing. Trust in precision and convenience with this comprehensive testing solution. Features and Benefits: Quick and simple to use, allowing easy testing of polarity, loop impedance and RCDs (30mA) Red/green LEDs and buzzer indicate 28 fault conditions Durable due to tough sculpted design, which also allows for easy removal Typical Applications: Electrical installations