LY-23C-4 LED Super thin 2.5M children logarithmic Visual chart light box
$
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Specification: | |||||||
Type of chart: | Graphical | ||||||
Distance of testing: | 5m | ||||||
Range of testing: | from 4.0 to 5.3 | ||||||
Record of vision: | five points record, decimal record, fraction record | ||||||
Size: | 920 * 280 * 100mm |