Digital Scale with Extreme Accuracy 2/1000th Gram Accuracy This is the perfect compact digital scale for weighing gold, gems, and jewelry. Weighs up to 20 grams with 2/1000th gram accuracy. Weighs in grams, grains, carats, pennyweights, milligrams, ounces, and troy ounces. Includes a backlight, parts counting function, tare function, and auto-off. This scale has a 20-year warranty and runs on 3 AAA batteries which are included.