Effective range of measurement:
Range of binocular PD...................................................45~82mm
Range of monocular PD..............................................22.5~41mm
Absolute value of indicated error......................................≤0.5mm
Absolute value of asymmetrical error................................≤0.5mm
Absolute value of rounding error.......................................≤0.5mm
Distance of testing target..................................................30cm-∞
Power source..............................................................1pc battery
Dimension and weight...............................230X170X620mm,0.7kg
This model without knob of visual distance, adjust the visual distance
by pressing the function key