Brecknell PB500 Handheld Mechanical Utility Balance Scale, 500g Capacity, 2 1/2 x 3 Platform Accurate and reliable - unparalleled weighing performance Portable - convenient and lightweight compact design Counting function - Simple counting function Standard weighing modes -grams, ounces, pennyweights and troy ounces Battery powered - batteries included, auto power off Handheld Balance Scale weighs items in 0.1-g increments. Unparalleled performance and accuracy. Simple counting function. Rates are updated via a mechanical process. Portable, lightweight design. Auto shut-off. Scale is powered by a two AAA batteries (included).