Robust and User-Friendly Design: The GFCI outlet tester features a high-impact ABS housing, ensuring durability, compactness, and ease of use. It is capable of measuring voltage in standard outlets and power strips, as well as inspecting the circuit conditions of GFCI outlets. This receptacle tester is suitable for standard three-wire outlets with 50/60Hz AC voltage ranging from 110 to 125 volts, meeting general voltage requirements Accurate GFCI Wiring Detection: The GFCI outlet tester accurately identifies common wiring faults in both standard and GFCI outlets, ensuring electrical security. It can detect six common types of wiring fault: open , open neutral, open ground, dual open ground & neutral, /ground reverse, and /neutral reverse Clear Display and Intuitive Indicators: Equipped with a 1.7-inch HD backlit color LCD screen, the receptacle tester provides clear readings of voltage and wiring conditions. Bright green and red LED indicator lights offer an intuitive visual indication of wiring status, making it easy to identify circuit issues Convenient Auto-Hold Function: The auto-hold function locks the measurement data, making it convenient to view and easy to record. After measurement, if the GFCI outlet tester is removed, the "HOLD" indicator flashes on the screen, locking the data for about 10 seconds. To release it quickly, reinsert the device or briefly the power button. This helps inspect outlets in hard-to-see areas and assists those with poor eyesight, avoiding the need to get close to read values Wide Operating Conditions: The receptacle tester operates reliably in temperatures ranging from 32F to 122F (0C to 50C) and humidity levels from 0% to 70% RH, ensuring durability and reliability under working conditions Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the , the Philippines,Taiwan and so on. Voltage:AC110V Color: Blue Material: plastic Package Contents: 1 * Outlet 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.