Features:100% Brand new and high qualityEasy to operate, quickly check the safety of the socket connectionExquisite divisional design, test result display lights, double layer insulation protection, reference for test results,electrical leak-proof test buttonApplied in electrical maintenance testing,office electricity safety testing,home improvement electrical safety testing ,test wall socketsSpecifications:Brand:BsidePlug Standard: EU PlugRated residual operating current: 5mAEarth resistance: Earth resistance meet the standardSize: 58*53*53mm/2.28*2.09*2.09inWeight: 61gPackage Includes:1 x Bside AST01ER Outlet Tester 1 x English User ManualNotes:Socket tester display "Correct" means the pole is connected correctly, but does not means resistance value is passed designation standard. Only passing "Creeping Switch Test", it can finally obtain the earth resistance value to test whether the Protection System works well or not. To ensure your safety, don't make the insert out of shape to affect the test result