Jennings JSVG-20 Compact Digital Jewelry Scale 100 carat capacity x 0.01 carat resolution. Also measures in grams, grains, ounces, troy ounces, pennyweights and milligrams. Compact 4.75" x 3" x 1.5" size for easy storage and portability. Tare, calibration, auto-off and counting functions. Calibration weight, weighing tray, hard shell case and batteries included. 20 year manufacturer's warranty.