weighing scales-FC-3100/3200

Auto shut off timing selectable:120/180/240/360seconds/off)
Zero Rang(4% to full capacity)
Tare Range(100% to full capacity)
Two calibration weight units:kg/lb.
Open calibration weight
Power on zero-setting range:±10%
Zero range:±4% of full capacity
Three modes: Normal mode/Setting mode/Internal Auto Calibration mode
RS232 function                                                                         
Scale Size:the height of FC3100 is 500mm;
the height of FC3200 is 10000mm                                      
Power Source: Reachargeable 6x AA size batteries / 9v/500mA AC Adapter                                                      
Operating Temp&Humidity:5-35oC;25%~95%RH