DMiotech Receptacle Tester Circuit Analyzer US Voltage 90-120V AC Socket Outlet Tester Meter Live Line Checker DM6860B Safety. With CE Certification and smart chip,ensure there is zero leakage current while operating. Durability. Solid compact plastic and optimized inner structure, guarantee for years using. 5 FT anti-drop,sweet feature for the household use. FYI, electric chip can be easily damaged in the moist environment or been in the bumpy. Please keep it properly. Convenient. Lightweight (2.4 ounces)and handy size(2.56"x2.36"x2.17"), pretty easy to carry with for checking the outlet socket of the shed or treehouse. US Standard. 90V-120V, 50-60Hz. Perfectly match with most outlet sockets in daily using. Clear Result Guide Light Display. 5 pattern of lights: If you saw 2 green lights, means you connected all the wires correctly. If there is only 1 green light, something got to be wrong.