The industrys leading diamond tester used by jewelers, pawnbrokers and chain stores, Provides fast, repeatable and accurate readings, No waiting between tests, Patented electronics provide both visual and audible indications of a Diamond, The durable, retractable tip can test stones down to 1 point, If a diamond is indicated, use a Moissanite tester to confirm its a diamond, Operates on built-in rechargeable batteries or its included 120v AC, adapter/charger, SKU: MNMM1401