From A&D, the GF Series Legal for Trade Gold Scales are extremely user friendly and feature Super Hybrid Sensor (SHS) technology, which improves response speed, accuracy and minimizes maintenance costs. These legal for trade scales feature one touch internal calibration, and automatic self calibration when the scale senses temperature change. Has just a 1 second response time and comes standard with WinCT software to connect the scale to any computer through the RS232C port. Weighing modes include Grams, Decimal ounce, Troy ounce, Pennyweight, Carat, Momme, Grain unit, Pound, Pound/Ounce. 5 year warranty. Legal for Trade. Maximum weighing capacity of 310g x .001g.