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welcome to umbrella_cup。MESTEK Advanced RCD Electric Socket Tester Automatic Neutral Live Earth Wire Testing Circuit Polarity Detector Wall UK Plug Breaker Finder Electric Leakage Test with Voltage Backlight Display Need to check the wiring of the house and check the polarity of the socket connection? Need to test leakage tripping? Try our Socket Tester. It is a professional socket tester which rapidly detect whether the socket's wire connection is correct or not. With RCD test function, it is more practical and safe.   Features: Electric Socket Tester - Advanced socket tester for rapidly detecting whether the socket's wire connection is correct or not. Design with RCD/GFCI Test Button - Power outlet socket for correct wiring and RCD/GFCI trip function. It can test the protection system to ensure the household electrical safety. Perfect for protect your security against the risk of electric shock. Easy to Use - Detect whether neutral, live and earth wire is connected correctly and to indicate which wire is missing with clear light patterns. LED Light Display - With easy to read indicators to indicate the state of the socket, easy to judge: Correct, Open Ground, Open Neutral, Live/Neutral Reverse, Live/Ground Reverse, Open Live & Live Neutral Reverse. Bright LED Light & 3 Test Indicators - The light patterns are well labeled on the surface of the socket tester. The tester adopts a built-in light so it can also be used in the dark. Easy and fast to read the test result. Wide Application - 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 time in testing problems with sockets. Portable Design - Compact size, light weight and convenient to use. With voltage backlight display for testing voltage.   Specifications: Color: Black Material: ABS Plug Type: EU / US / UK (Optional) Voltage: 100V-240V, 50/60Hz RCD Tripping Current: ＞30mA  RCD Working Voltage: 220V±20V GFCI Tripping Current: > 5mA GFCI Working Voltage: 110V±20V Voltage Measurement: 90V～250V, 50/60Hz Working Environment: 0℃ ～ 40℃, < 80%RH Safety Rating: EN61010-1,12-030, EN61326-1 Item Size: Approx. 80 * 63 * 46mm / 3.15 * 2.48 * 1.81in Item Weight: Approx. 53g / 1.87oz Package Size: Approx. 9 * 8 * 7.5cm / 3.55 * 3.15 * 2.95in Package Weight: Approx. 83g / 2.94oz   Package List: 1 * Socket Tester 1 * User Manual (English) #sockettester #Electric #wirereceptacletester #wallplugdetectiontool #polaritycircuitdetector #diagnosticservicetool #Electrical #towingplugsocket #electricalplugssocket #socketdetector