The Major Tech Smart-Test Universal ELCB Tester is a microprocessor-controlled instrument designed for testing and verifying Earth Leakage Circuit Breaker (ELCB) performance in electrical installations. It measures voltage from 100V to 400V L-E, current from 5mA to 1000mA, and includes programmable trip current settings (5, 10, 30, 100, 300, 500mA) with built-in 100-second timer and direct readout of disconnection time and tripping phase angle. Ideal for electricians, electrical contractors, and facilities managers performing routine ELCB compliance testing and maintenance.