Lovinglove Electronic Jewelry Trays High Precision 100g/0.01g Mini Gold Karat Scale 6 kinds of unit conversion. All vital measurements are covered including: g /oz / ct / ozt / dwt / gn. The TARE key allows you to determine the net weight of the items you are weighing. Automatic low electric alarm function Convenience - Has a highly visible LCD backlight display and large size digits that makes it easy to read in all light conditions. Includes a weighing tray to weigh multiple small items. Power supply: two 7 batteries(not including the batteries) Weighs up to 100 grams in increments of 0.01 grams. The electronic high precision sensors guarantee you a precise professional weighing session.