NTEP CERTIFIED Weigh precious metals and gems with accuracy. Precise and reliable. Meets Class II Legal-for-Trade use in retail. Seven application modes: weighing, parts counting, check weighing, percent weighing, totalizing, display hold and density determination. G/KG/CT/OZ/OZT/DWT/LB/GRN convertible. Large, easy-to-read LCD display. Simple four-button operation. Calculates sample weight. Powered by 4 AA Batteries or included AC adapter.ULINE offers over 41,000 boxes, plastic poly bags, mailing tubes, warehouse supplies and bubble wrap for your storage, packaging, or shipping supplies.