SAFE INSULATION DESIGN: This RCD tester with LCD display adopts insulation design, because there is no risk of electric shock when using it. Guaranteed your life safety. MULTIPLE VOLTAGE MEASUREMENTS: The power outlet tester is used to measure voltage. Including 220V20V RCD working voltage, 110V20V GFCI working voltage, 90-250V voltage measurement range, 0-99V leakage voltage range. Allows you to easily detect voltage data about what you want to know. CHECK THE WIRING CONDITION: The socket tester is also used for polarity detection of power socket wiring. Including correct, lack of ground/neutral/live, reverse live, reverse live neutral, reverse neutral, and lack ground, seven wiring methods. Help you quickly detect whether the wiring is connected correctly, and troubleshoot common hidden dangers of the line. CHECK WHETHER THE LEAKAGE PROTECTOR IS GOOD OR BAD: insert the tester into the three-hole power socket with correct wiring, press the RCD button (less than 3 seconds), then the normal leakage switch will trip. If it does not trip, it means that the leakage switch has invalid. Help you troubleshoot potential leakage. PRACTICAL CIRCUIT SAFETY TESTING TOOLS: The socket tester can be used to test the daily circuit safety inspection of the family, the circuit inspection of the office and shopping malls, the inspection of the factory equipment, and the acceptance of the circuit of the new house. Meet your needs for circuit and voltage detection in different occasions. Product Wowlela socket tester is designed to detect the most common wiring problems in standard and RCD sockets. The test results can be displayed on the LED lights and LCD screens on the tester. Detection range: open ground, reverse polarity, open live wire, open neutral, and live/ground reverse. Working Voltage: 90-250V/45-65Hz Phase Voltage: 90-250V/45-65Hz Leakage Voltage: 0-99V/45-65Hz Accuracy: (2.0%+2) RCD Test: >30mA RCD Working Voltage: 220V20V GFCI Working Voltage: 110V20V HT107E Socket tester with a 250 rating, the socket tester is durable enough to cope with any working environment. Electrical voltage tester with LED display, it can help you measure the socket voltage and display it clearly on the LCD scree Read more Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-dadangjia