Feature

Digital hairspring type.

Accurate measurement positioning and accurate data

LED light source, low consumption and long battery life

Many technology and design patents

Main technical index

1. Range of data display

Binocular pupillary distance: 44～83mm

Left or right pupillary distance: 22～41.5mm

2. Effective range of measurement

Binocular pupillary distance: 45～82mm

Left or right pupillary distance: 22.5～41mm

3. Indication error

≤0.5mm

4. Rounding error

≤0.5mm

5. Distance of target

30cm～∞

6. Power source

Voltage: DC 6V

Specification:  AA battery

Quantity: 2 pieces

7. Time for automatic shut-off

1 and a half minutes after stopping operation

8. Overall dimensions

219mm(L)×169mm(W)×86mm(H)

9. Weight

0.7kg