Description Widely UsedWidely used in schools, laboratories, factories and other social areas for electrical repair testing, desktop socket testing, power strip testing and wall socket testing, can save a lot of time for testing outlet problems. 7 LED Lighting ModesThe voltage tester has 7 easy-to-read indication values to show the status of the outlet. Easy to judge: Correct, Ground Open, Neutral Open, Reverse/Neutral Reversed, Reverse Direct/Ground, Reverse Open and Neutral Live. Easy to UseThe socket tester detects whether the neutral wire, live and ground is properly connected and to indicate which wire is missing with clear light patterns. The tester adopts built-in light and is clearly marked so that it can be used in the dark. Easy and quick to read test results. Bright LED LightPlug the power tester into any suspicious outlet, clear LED indication shows accurate results immediately, saves you a lot of time and increases efficiency. efficiency of checking each socket. Socket TesterSocket tester to quickly detect whether the wire connection of the socket is correct or not.Design with RCD/GFCI test button - Socket outlet for correct wiring and RCD/GFCI trip function. Can test the protection system to ensure household electrical safety. Perfect to protect your safety against the risk of electric shock.