The Infyniti Bolt 100g x 0.01g digital scale is a sturdy well built dependable unit. This scale comes with a maximum capacity of 100g with a graduation of 0.01g. It weighs in Grams (G), Ounces (Oz), Grains (Gn), and Carats (Ct). It is powered by 2 x AAA batteries which are included with this scale. The digital display is backlight by an LED for easy viewing. The scale uses an auto calibration on start up to ensure accuracy and is backed by a manufacturers 30 Year Limited Lifetime Warranty.