Original Japanese brand (Kyoritsu) - one of the most famous international brands in electrical testing devices Auto Ramp Test and DC Test Measurement Multipliers: x1/2 - x1 - x5 Test Voltage 25V/50V Operating Current from 10mA to 500mA Phase Angle Check 0°/180° Safety Rating CAT III 300V Clear LCD digital display Press to Test button with Hold function Use: Testing and measuring the performance of Earth Leakage Circuit Breakers (RCD/ELCB) in electrical panels - essential for maintenance technicians, contractors, and certified consultants.