The Citizen carat and gram scale has the fastest response time with highly stable readings. With 0.01 gram readability the scale features automatic calibration for 100% accuracy. The model has hinged windscreens stainless steel platform and LED display. The case, adapter, scoop and calibration weight is included. The multiple weighing units are as follows karats, grams, pieces, ounces, pennyweights, troy ounces and grain. See the Citizen karat and gram scale and more great tools at Stuller.com/tools.