Still need to check the house wiring and check the connection plug polarity? Need to test the leak trigger? Try our socket tester. It is a professional socket tester which quickly detects whether the wired connection of the socket is correct or not. With RCD test function, it is more convenient and safe. Features: 1.Electrical Socket Tester - Advanced socket tester to detect quickly whether the socket wire connection is correct or not. 2.RCD test button design - Power socket for correct wiring and RCD trigger function. It can test the protection system to ensure household electrical safety. Perfect to protect your safety from the risk of electric shock. 3.Easy to use - Detect whether the neutral, live and ground wire is correctly connected and to indicate which wire is missing with clear light patterns. 4.Bright LED light and 3 test indicators - The light patterns are well labeled on the surface of the socket tester. The tester adopts built-in light so that it can also be used in the dark. Easy and fast reading of the test result. 5.7 LED light patterns - With 7 easy-to-read indicators to show the socket status, easy to judge: Correct, Open Ground, Open Neutral, HOT/Neutral Reverse, HOT/Ground Inverse, Open Hot, Live Neutral Inverse. 6.Wide Application - Widely used for testing of electrical maintenance, desktop socket testing, power strip testing and wall socket testing in schools, laboratories, factories and other social areas. It saves you a lot of time in socket problem testing. 7.Portable Design - Compact size, light weight and easy to use. < p> Note: 1. The socket tester display Correct only means the pole is properly connected, but does not mean the resistance value is within the designation standard. 2. By only passing the Creeping Switch Test, it can finally get the ground resistance value to test whether the protection system works well or not. 3. To ensure your safety, do not deform the insert to affect the test result. Prohibit testing in public without permission. 4. Turn off electrical appliances before checking power protection systems to avoid damage. Features: Color: Black Material: Flame Retardant ABS Plug Type: EU Voltage: 220V-250V (EU) 50-60Hz RCD test current: 30mA Working environment: -20℃ ～ +60℃ Earth Resistance Meets Standard Item Size: 55*60*55mm/2.17*2.36*2.17in Item Weight: 55g/1.93oz Package size: 7.5*7.5*7.5cm / 2.95*2.95*2.95in Package Weight: 88g / 3.10oz Package List: 1 * Plug Tester 1*User Manual Note: The data is manual measurement, please allow 1-66cm error, due to the light and screen differences, there are will have a certain color difference, the specific received in kind prevail.