... ..Display: gram, gold K, %, specific gravity 4..precision balance Jewelry Tester 1.11 Metals analysis 2.Precision:0.1%,1%-99 ... radiation,Ag Calibrationmini computer to save report by USB Jewelry Tester Analysis Elements: Au ,Ag ,pt ,Pd,Rh ,Ru ,Cu,Zn ... testing report will be shown timely. NAP-7800 Gold Testing Analyzer