Timbangan Analitik  Optimize your laboratory weighing Common　Specification Tare Zero to Full weighing range Span adjustment ALE･････Manual operation Span Adjustment with externalcalibration weight ALE-R･････Semi-automatic Span Adjustment with built-incalibration weight Over error "o-Err" showed when Full weight range + 9 more digits over Temperature and humidity range 10～ 30℃、Up to 85ï¼… rh(without the dew condensation) Power source AC adapter: Input 100-240VAC,50-60Hz / Output 5.95VDC Dry-cell battery: AA batteries 4 pcs Output RS232C + USB