This On Balance milligram scale delivers precision on a discount price point. The 20 gr. capacity and 0.001 gr. accuracy makes it the perfect scale for all precision weighing needs up to 20 gr. It features an auto cut-off after 180 seconds (3 minutes).This unit features a stainless steel platform and includes calibration weights, a tray and tweezers. Presentation is in the form of an attractive storage box. 2 x AAA batteries are included.This jewel scale will weigh the following units: Grams (gr), Ounces (oz), Troy Ounces (ozt), Pennyweight (dwt), Carats (ct), Grains (gn) Net weight: 119 gr. Dimensions: 10.0 x 8.8 x 3.1 cmThis precision scale comes with a 3 year warranty.