Easy to use M-24 Mizar gold tester isone of the most advanced gold testing equipment. It precisely determines gold karat values for yellow gold and white gold,equal to or greater than 9k, 10k, 12k, 14k, 16k, 18k, 20k, 22k, and 24k. The M-24 Mizar electronic gold testing kit uses a liquid acid solution (included in the kit). Fully battery operated making it not just portable but also safe to use, fast, realiable and comes with a2-year manufacturerwarranty. Batteryoperated. Replacement Chemical Kit only, click to view.