[Detect Common Wiring Faults]Just plug it in to easily detect outlet wiring problems fast according to the indicator light. Our outlet tester is a good helper for home socket safety. [GFCI]With GFCI detection button, allows for the check of trip function for GFCI. [For Grounding Products]Our socket tester can accurately detect whether the socket is grounded before using grounding products. [Compact Size]Easy to carry and use. Designed for use with 110 or 125V AC at 50 or 60Hz in 3 wire outlets Circuit Testers with GFCI Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. Voltage: AC110V Colour: Material:Plastic Package Contents: 1x Plug Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.