... two RS232 3 multi function HAW High Precision Digi Counting Scale Resolution1/30000ChargePower supply / rechargeable batteryCalibrationSingle point ... TJ (in Taiwan), KJ (in Hong Kong)FunctionTare, counting, check weighing, accmulation, print,Gross and net weight convertionOptional ... -30K Capacity (g)3000 7500 15000 30000 Precision (g) 0.1 0.2 0.5 ... VAC,50/60Hz High Precision Digi Counting Scale