Description: brand new and high quality Features: Plug and for play,one button to detect the working state of the leakage switch protector. Conduct safety hazard investigation and acceptance for household,office,and factory electrical outlets. It can detect and judge the polarity of the circuit and detect the trip for protection of the leakage for protection switch. Socket tester only,other accessories demo in the picture is not included Specification: Type: Socket Tester Material: Plastic,Metal Applications: Household,office,and factory Features: Leakage detection,socket test,polarity judgment,convenient and practical,versatile,inspection tools Dimension: app.7.4x7.4x8cm/2.91x2.91x3.15in Specifications: EU,UK,US (optional) Quantity: 1 Pc Note: 1.Just passing "Creeping Switch Test",it can eventually get the earth resistance worth testing to see if the for protection system works well or not. 2.To ensure your safety,do not make the use of the mold to influence the test result. 3.Please allow 0-1cm error due to manual measurement.pls make sure you do not mind before you bid. 4.Due to the difference between different monitors,the picture may not reflect the actual color of the item.Thank you Package includes: 1 Pc x Socket Tester