Electrical Socket Tester - Advanced socket tester to quickly detect whether the socket wire connection is correct or not. Design with RCD/GFCI test button - Socket outlet for correct wiring and RCD/GFCI tripping function. It can test the protection system to ensure household electrical safety. Perfect to protect your safety from the risk of electric shock. Easy to use - Detect if the neutral, live wires and ground wire are connected correctly and indicate the missing wire with a light pattern clear. Portable Design - Compact size, light weight and easy to use. With voltage backlight display for testing voltage. LED light display - With easy-to-read indicators to show socket status, easy to judge: Correct, Open Ground, Open Neutral, Inverse Live / Neutral, Inverse Live / Ground, Open Live and Inverse Neutral. It saves you a lot of time testing problems with sockets. LED indicator light and 3 test indicators - Light patterns are well labeled on the surface of the socket tester. The tester adopts built-in light, so it can also be used in darkness. Easy and quick to read the test result. Wide Application - Widely used for electrical maintenance testing, office socket testing, power strip testing and school wall socket testing , laboratories, factories and any other social field. Voltage: 100V-240V, 50/60Hz Differential tripping current: ＞ 30mA RCD Working Voltage: 220V ± 20V GFC trip current 5mA GFCI operating voltage: 110V ± 20V Voltage measurement: 90V～250V, 50/60Hz Working environment: 0～40℃, 80%RH Safety Rating: EN61010-1,12-030, EN61326-1 Item Size: Approx. 80 * 63 * 46mm / 3.15 * 2.48 * 1.81in Item weight: approx. 53g / 1.87oz Package weight: approx. 83g / 2.94oz Package List: 1 * Socket Tester