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, whether the LED turns on to show the results. Come on and try it, it won't let you down. Features: Small size and easy to carry, you can take it anywhere you want to use, you can also quickly check that the plug wire connection is correct or not. Easy to use: You just need to plug it in to check, also with one-key detection design, which can save your time. With 6 different LED light patterns, this indicates different, easy-to-read test results: correct, open ground, open neutral, reverse/reverse, reverse/neutral, reverse/run rear, missing ground. Wide applications: Can be used for home, bathroom, kitchen, also can be sued for electrical maintenance testing and safety inspection. Light indicators display test results can display from Intuitive way the test results, even in the sun or in a dark environment can be used normally, giving you a better using experience. Features: Material: ABS Plug: EU, UK, US (optional) Operating 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 operating 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 / 2.6 ounce Packing size: 75 * 70 * 60mm / 3.0 * 2.8 * 2.4in Package weight: 107g / 3.8 ounces Packing List: 1 * Electrical Socket Tester (Optional)