Carat Scale 100ct Presidium utilizing Advanced Circuitry Design and SurfaceMount Technology (SMT). The only portable carat scale that is certified Legal for Trade in the market it promises reliability and consistency for long period of continuous usage. Designed specially for jewelry traders on the move by the leading maker of gemological instruments its compact size and rugged build allow for easy-to-travel usage and durability. 100.00 carats (10.000g) weighing capacity 0.01 carat (0.002g) graduation. Selection mode: gram/carat/ ozt/ grain. Do not require recalibrating during operation. Automatic power down after 10 minutes from the last measurement.