HomeProduct Power Source2 x AAA Batteries 2 x AAA Batteries Filter Showing the single result Default sorting Sort by popularity Sort by latest Sort by price: low to high Sort by price: high to low Sort by editor review Electronics Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles $20.97 BUY NOW