Tree PIZA-12 Kitchen Pizza Bench Scale 12lbs x 0.002lb RS232 & AC Adapter Capacity 12 lbs Resolution 0.002 lb Includes AC Adapter 9V DC Warranty 2 Years Accuracy ± 2d Pan Size (in inches) 12.2 x 12.6 inches Scale Dimensions 12.2 x 12.6 x 3 Inches RS232 Port Yes LCD Height (inches) - Digital 1.1 inch Beeper Yes Auto Backlight Yes, Selectable Auto Shut off Yes Unit Switching lb, kg, oz, & lb:oz AD Processor 21 bit A/D AD Update Speed 10 Hz Settling Time < 2 seconds Calibration Software AnyCAL No. of Keys 4 Memory: Zero Counting functions: No Auto Hold: No USB: No Battery No - But can use 6 AA Batteries - NOT included