Designed to fully comply with the testing requirements of the 18th Edition. Designed to be worn around the neck with a comfortable harness for easy function selecting and testing. RCD-LOC XLT technology for loop testing without tripping any type of RCD or RCBO with very high accuracy and no RCD uplift. Features auto-start loop and continuity test, colour-changing RGB display indicating error. Supplied with a toolbox-style carry case. Auto-Function Detection Prospective Short Circuit Test RCD Test Earth Fault Loop Impedance Test Mains Polarity Test Backlit LCD Display Fully Protected on All Ranges Auto-Function Detection Prospective Short Circuit Test RCD Test Earth Fault Loop Impedance Test Mains Polarity Test Backlit LCD Display Fully Protected on All Ranges