1AC-I is the latest product in the VoltAlert AC non-contact voltage tester family from Fluke and is designed to be pocket-sized and easy to use. Just touch the tip to a terminal strip, outlet, or cord. When the tip glows red you know there's voltage in the line. Electricians, maintenance, service and safety personnel, as well as DIY, can quickly test for energized circuits and defective grounds on the factory floor, in the shop, or at home.