Mettler Toledo's Jewelry Plus (JP) high-resolution gram scale is perfect for any operation where accuracy is a must! With accuracy as high as 0.01mg (0.00001g), this scale ensures that you will have perfect precision! The scale comes with a draft shield due to its high precision and can be converted from 42g capacity to 120g capacity, and still offers 0.1mg (0.0001g) accuracy at the higher weighing mode! Complete with all the features available on all of the JP line of scales, this scale is an absolute must for refiners, gold buyers or fire assayers! Unlike the JP Carat Scales, and the other JP Gram scales, this scale comes equipped with 2 RS232 interfaces, as well as a USB port. Because of the incredible accuracy of this scale, it is also ideal for use as a carat scale. The scale measures 143⁄32” long.” W x 9 ¾” D x 13” H (with draft shield), and has a 31⁄6”weighing pan. The scale operates on AC Adapter only, and weighs in the following modes: ct, g, mg, kg, lb, oz, toz, grain, pennyweight and more.