American Weigh Scales AWS-600-BLK Digital Personal Nutrition Scale, Pocket Size, Black 600 Gram capacity with 0.1g resolution Units of measure include: g, ounce, troy ounce, dwt Includes two AAA batteries. Measurement Type: Gram, Ounce, Carat, Giganewton, Troy Ounce, Pennyweight Ships pre-calibrated; Calibrates with a 500g weight (sold separate) 10 Year Limited Warranty