The engineers at GemOro have created two new generation, superior carat scales with unique features, style, precision, durability and more! These extra precision carat scale offer accuracy of 0.005ct, with a capacity of 100ct and 250ct! Each scales functions are controlled by a convenient, easy to use 4-button control panel. Its innovative, low profile flip up draft shield easily expands to accommodate the weighing of large stones or parcels. The rubberized compact carrying case protects the scale while in transit and holds the scale, calibration weight, Swiss-style diamond tweezers, diamond scoop, stainless steel weighing platform and universal voltage 100-240V AC adaptor.