DigiWeigh digital jewelry scale,MODEL:DW-100AS Allows you to choose from 4 different modes: Grain (gn), Gram (g), Ounce (oz) 2 "AAA" batteries included, PLUS 1 FREE fifty (50) gram calibration weight.. the only weight you'll ever need to calibrate this unit Set includes scale, 50 g calibration weight , Flip-Open cover protects STAINLESS STEEL weighing platform when scale is not in use MODEL:DW-100AS