This professional socket test can be used in your home, office, kitchen, hotel and other places you like, it can help you check the connection polarity and household wiring of the socket, that the LED lights up to show the results. Go try it, it won't let you down. Features: Small in size and easy to carry, you can take it anywhere you go. want to use it, you can also quickly check the socket wire connection is correct or not. Easy to use: just plug it in to check, also with one-touch detection design, which can save your time. With 6 different LED light patterns, it indicates different test results, easy to read: Good, Open Ground, Open Neutral, Reverse / Reverse, Reverse / neutral, reverse/reverse, missing ground. Wide applications: Can be used for home, bathroom, kitchen, also can be sued for electrical maintenance test and safety inspection. br/> The test result display light indicators can display from my Intuitive display of test results, even in the sun or dark environment can be used normally, giving you a better using experience. Features: Material: ABS Plug: EU, UK, US (optional) Working voltage: 90~250V / 45~65Hz Phase voltage: 90~250V / 45~ 65Hz Accuracy: (2.0% + 2) Leakage voltage: 0 ~ 99V / 45 ~ 65Hz RCD test: > 30mA (EU/UK plug) RCD working voltage: 220V 20V GFCI working voltage: 110V 20V GFCI test:> 5mA (US plug) Working environment: 0~40, 20%~75%RH Storage environment: -10~50, 20%~80%RH Item Size: 68 * 65 * 60mm / 2.7 * 2.6 * 2.4in Item Weight: 74g / 2.6ounce Package Size: 75 * 70 * 60mm / 3.0 * 2.8 * 2.4in Package Weight: 107g / 3.8ounces Packing List: 1 * Electrical Outlet Tester ( optional)