Features: brand new and high quality A must for electrician and DIYer to rapidly detecting whether the socket's wire connection is correct or not. Light patterns are well labeled on the back of the device itself; The Green LED indicators can be light up clearly even in strong sunlight; The tester incorporates a built-in light so it can also be used in the dark, making you read it fast. Design with RCD/GFCI Test Button It can test the for protection system to ensure the household electrical safety. Perfect for protect your security against the risk of electric shock.Gift for your Family. Includes five different patterns for you to read: Correct, Missing Earth, Live Earth Reverse, Live Neutral Reverse, Missing Neutral; The fault chart provides a clear indication that you can quickly understand and use it. Widely used for electric maintenance testing, office sockets testing, power strips testing and wall sockets testing in school, laboratory, factory and other social field. It saves you lots of for time in testing problems with sockets. Specifications: Material: Plastic Size: 75x48mm/ 2.95x1.89 inch Adapter Length: 55cm/2.17 in Measuring range: 220V-250V Accuracy of measurement: III Power supply: 220 V Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Socket Outlet Tester