Unique pan design, durable ABS housing slides back to engage the load cell and expose the display and buttons for operation. Weighing units for g, oz, ozt, dwt. 0.3" LCD display. Text weight unit prompts with stability and overload indicators. Auto shut off to preserve battery. Cover protects display and keys and prevents load cell damage in
transport. Smaller than most pocket scales, allows a comfortable fit in your pocket. Piano style mechanical buttons provide positive dependable operation. Includes calibration software using 100g weight for PS121 and 200g weight for PS251. Calibration weights are not included. Two CR2032 lithium batteries included. 1 year warranty.