... Easy Operate,Portable *Test Au,Ag,Pt 300g/0.01g Portable Electronic AnalyzerMODELMH-300KMaximum weighing300gMeasurable range5-300gWeighing precision0.01gAverage weight0.001gS ... parameter valueSegment interfaceRS-232Instrument accessoriesaccessories, Thermometer, Tweezers, Calibration weight, Acadapter, Opration manualManufactureNapco Precision Instrument Ltd 300g/0.01g Portable Electronic Analyzer