Huanyu Optical Digital PD Ruler Pupil Distance Meter Tester Optometry Equipment BATTERIES NOT INCLUDED
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<b>[Product Information]</b><br>
<ul>
<li>Automatic Shutdown</li>
<li>with Memory Function</li>
<li>23A/12V Battery required, but NOT included.</li>
<li>Monocular measurement available</li>
</ul>
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