Features: This GFCI Outlet Tester features a color LCD display to detect wiring faults in 120V receptacles, offering 135V safety certification for reliable electrical diagnostics. Engineered with LED indicators and a strong plastic housing, this receptacle tester simplifies wiring verification while meeting strict US electrical standards. Ideal for electricians, homeowners, and facility managers search professional safety check without complex equipment. Use during home renovations, office maintenance, or pre installation tests to validate outlet functionality and prevent electrical hazards. small and battery frees , it delivers fast visual feedback on open grounds, reversed polarity, and GFCI tripping risks for worry frees inspections. Specifications: Material: Plastic shell Size: about 3.55x5.58x11.17cm/1.4inchx2.2inchx4.4inch Power supply: 2xAAA(Not included) Package Includes: 1 set Electrical Outlet Tester note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.