Fangrui Product Details Simple Operationsimply Insert The Tester Into An Already Powered Three-pin Socket. The Socket Wiringcondition And Ac Voltage Can Be Easily Determined Based On The Information Displayedon The Instrument Screen Insert The Tester Into A Standardthree-pin Power Socket . If A Wiringsequence Error Is Detected , Theorange Backlight Illuminate Toindicate A Wiring Error After Inserting Into The Socket, The Dataautomatically Locks After Three Seconds.once Locked, The Unlock Buttonto Release The Data If There Is No Operation Within 5 Minutesof Powering On , The Instrument Willautomatically Shut Down Battery: Aaa * 2 (shipped Without) Due To Different Batches, There May Be Differences In Product Appearance And Printed Text, Which Not Affect Use Plug Type :eu Plug,it Applies To Indonesia, Germany, France, Spain, Italy And So On. Voltage: Ac 220v Colour:black Material:abs Package Contents: 1 X Socket Tester Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Display