This Boston scale is intended for non-professional use. It is used for weighing all types of valuables such as gold, silver, coins, gemstones, medicines, and herbs. It comes with a warranty card and an instruction manual. Specifications: Capacity: 500g/0.1g Batteries: 2xAAA Automatic calibration Auto power off, full tare Weighing modes: g/oz/ozt/dwt/gn/ct