The Fluke 1AC II Non-Contact Voltage Testers is a selection of pocket sized voltage detectors that The next generation VoltAlert AC non-contact voltage testers are easy to use just touch the tip to a terminal strip, outlet, or supply cord. When the tip glows red and the unit beeps, you know theres voltage present. Electricians, maintenance, service, safety personnel, and homeowners can quickly test for energized circuits in the workplace or at home. It senses the steady state electrostatic eld produced by AC voltage through insulation without requiring contact to the bare conductor. A red glow at the tip and a beeping noise if not switched OFF indicates the presence of voltage. Meets IEC 61010-12001, UL 61010-1 2nd ed., CANCSA-C22.2 No. 61010-1-04, and ISA-82.02.01 Pollution Degree 2