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.

Bright Led Display - Light patterns are well labeled on the back of the device itself. The Red 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

7 LED Light Patterns - With 7 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.

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. Home improvement acceptance and safety inspection，It saves you lots of time in testing problems with sockets.

Portable Design - Compact size, light weight and convenient to use. With voltage backlight LCD display for testing voltage. Package Content: 1 x Advanced GFCI Outlet Tester； 1 x English Manual ；24 Months Warranty