My Weigh SCGEMPRO250 250 GemPro 250 50g x 0.001g Scale 250 carat capacity x 0.01 carat resolution. Also measures in grams, ounces, pennyweights, troy ounces, carats, and grains Compact 5.25" x 3.75" x 2.5" size for easy storage and portability Tare, calibration and programmable Auto-off functions AC adapter, weighing tray, calibration weight and hard shell carry case included 30 year manufacturer's warranty