Detect Common Wiring Faults: Simply plug in to quickly identify outlet wiring issues using the indicator light. This outlet tester helps ensure home socket safety. GFCI Detection: Features a GFCI test button to verify the trip function of GFCI outlets. Grounding Check: Accurately determines if an outlet is properly grounded before using grounded appliances. Compact Design: Portable and easy to use. Designed for 110/125V AC, 50/60Hz, 3-wire outlets. Plug Type: US standard plug, compatible with outlets in Canada, Mexico, Thailand, Taiwan, the Philippines, and other countries using US-style plugs. Voltage: AC 110V Color: As shown Material: Plastic Package Includes: 1 x Plug Tester Note: The actual color may vary slightly due to lighting and display differences. Measurement may vary by +/- 1-3 cm.