[Purpose] This socket tester can check the electrical connection of the socket if it is correct. It is a good tool that is used to ensure electrical safety at home.7 LED light modes: there are 7 LED indicator lights to show the status of the socket, easy to judge.[Application] The tester can be used compatible with electrical maintenance in schools, laboratories, factories and other social areas. It is perfect compatible with office socket testing, socket testing and socket testing.[Portable] Compact size and light weight, you can easily store it in tool box and your bag, convenient to carry.Easy to use: Detect the neutral line, connect the wires and the ground wire correctly and indicate which line of the bright light mode is missing. The lamp socket symbol is labeled on the surface of the socket tester, easy to use. The tester has a built-in light that works well in the dark.Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on.color:BlackMaterial:plasticPackage Contents:1 x Socket TesterOnly the above package content, other products are not included.Note: Light shooting 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.