Electric - Advanced for detecting whether the socket's wire connection is correct or not. Design with Test Button - Power outlet socket for correct wiring and trip function. It can test the protection system to the household electrical safety. Perfect for protect your security against the risk of electric shock. Easy to Use - Detect whether neutral, live and earth wire is connected correctly and to indicate which wire is missing with clear light patterns. Bright LED Light & 3 Test Indicators - The light patterns are well labeled on the surface of the . The tester adopts a built-in light so it can also be used in the dark. Easy and fast to read the test result. 7 LED Light Patterns - With 7 easy to read indicators to indicate the state of the socket, easy to judge: Correct, Open Ground, Open Neutral, Live/Neutral Reverse, Live/Ground Reverse, Open Live & Live Neutral Reverse. Wide Application - Widely used for electric maintenance testing, office sockets testing, power strips testing and wall sockets testing in school, laboratory, factory and other social field. It saves you lots of time in testing problems with sockets. Portable Design - Compact size, light weight and convenient to use. With voltage backlight LCD display for testing voltage. Voltage: 48V-250V 45-65Hz RCD Test: 30mA RCD Working Voltage: 220V20V Voltage Measurement: 48V~250V / 45~65Hz Accuracy: (2.0%+2) Working Environment: 0 ~ 40, 20% ~75%RH Storage Environment: -10 ~ 50, 20% ~80%RH Safety Rating: EN61010-1,-2-030, EN61326-1, II 300V Plug Type :EU Plug,it applies to Indonesia, Germany, France, , Italy and so on. Colour:black Material:plastic Package Contents: 1X Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.