The Jennings Mack 20 Table Top Precision Scale has a 20 gram capacity with a 0.002 gram resolution plus grain(308.60 gn x 0.02 gn), troy ounce(0.6430 ozt x 0.0001 ozt), ounce(0.7050 oz x 0.0001 oz), pennyweight(12.860 dwt x 0.002 dwt), carat(100.00 ct x 0.01 ct), tical(1.7100 t x 0.0002 t) and milligram(20,000 mg x 2 mg) weighing modes. This scale has two backlit displays, tare and hold features, calibration mode and attached, hinged windshield. Batteries, calibration weight and weighing tray included.