The Greenlee 1143-5000 V.O.C. Sidekick is part of Greenlee's premium collection of tools and accessories. This VOC sidekick is designed to identify defective insidewire and jacks, and it measures resistance, AC/DC volts, quasi square waves, and pair balance. It replaces the need for other meters, and provides tone for twisted pair or crossed conductor identification. It comes with a softcase with adjustable hook, and a low battery indicator light.