The Tree HRB-203 scale is a precision digital analytical milligram balance that offers high quality performance at an affordable price. These balances are compact, feature a large backlit LCD display, rugged ABS housing, heavy duty load cell, glass draft shield, leveling feet to ensure accurate weighing, removable stainless steel weigh pan, multiple weighing modes, RS232 interface, A/C power supply or AA battery power and are easy to use. HRB balances meet the highest technical weighing requirements for a balance in its class. The HRB-203 scales are ideal balances for general laboratory, industrial and educational weighing applications in school classrooms. Model Tree HRB-203 Casing Glass Draft Shield Capacity 200g Resolution 0.001g Display Divisions 200,000 Internal Resolutions 16m Accuracy +/-5d Platter Size 3.85" Ø Draft Shield Glass Scale Dimensions 7.5 x 10 x 10.5" LCD Height 1" Beeper Yes Auto Backlight Yes, Selectable Auto Shut Off Yes, Selectable Auto Hold No Unit Switching g,oz,lb,dwt,ozt,ct,tlt,tlh,tlj,gn, dr,mm,tola,gsm,T/A/R,T/M/R AD Processor 24 bit A/D AD Update Speed 7.5 Hz Settling Time <2s Calibration Software AnyCAL No of Keys 5 Memory Zero Counting Function No RS232C Yes USB No Battery Yes, 6 x AA Batteries AC Adapter Yes, 12VDC