Lightweight handy size, easy to carry storage.With three indicators LCD display, it is easy for newer version to use. The smart socket tester is mainly used for the leakage switch safety detection power socket wiring polarity detection. It can quickly accurately detect the wiring situation of the socket. It is an intelligent digital display tester. The voltage and frequency of the power socket can be detected whether the wiring is correct or not. The program includes six states, but only one state can be displayed at a time: correct, the absence of earth, missing neutral, live neutral ground, live, live earth the absence of earth. Intelligent detection to ensure the safety of household electricity.RCD testing, the detection of a key leakage protection status. Voltage and frequency are displayed on the lower part of the LCD screen. Number of pieces delivered: 1 Color: Black Size: 60*67*45mm Specification: Material: ABS Black color tension measurement: 220-250V 50-60Hz voltage measurement accuracy: (2% + 5) Operating current: 30mA RCD operating voltage: 220V + 20V