This professional socket tester 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, which the LED lights up 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 to anywhere you want to use, you can also quickly check the socket wire connection is correct or not. Easy to Use: You just need to plug it in to check, also with the one-touch detection design, which can save your time. With 6 different LED light patterns, it indicates different test results, easy to read: correct, 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 testing and safety inspection. The test result display light indicators can intuitively display the test results, even in the dark environment can be used normally, giving you a better using experience. Specifications: 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: 220V20V GFCI working voltage: 110V20V 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 / 3.8ounce Packing list: 1 * Electric Socket Tester (optional)