Test Grounding: Only used to check whether the power outlet is properly grounded, if there is a wiring problem or the outlet is not grounded, the tester will remind you through the indicator light Applicable Voltage: UL listed, 125V AC, 50/60Hz Easy to Use: Just plug the tester into a standard three-hole socket Simple to Understand: Clear LED indicator, you can quickly determine the grounding status of the socket, you only need to observe the light indicator legend Compact and Convenient: The tester is small in size, easy to carry, suitable for a variety of scenarios Voltage: AC110V Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. Color: As shown Material: plastic Package Contents: 2 x Circuit Testers