JH-5 5M LED children logarithmic visual chart light box, 2.5cm thickness
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LY-21C LED Super thin Standard Logarithmic 5M Visual chart light box
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Item#
LY-21C
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Description
| Product Abstract: | |||||||
| This visual chart light box is made of high quality raw materials, all aspects of its performance are far beyond the traditional visual chart light box. | |||||||
| Features: | |||||||
| * Brightness is uniformity, light soft and comfortable | |||||||
| * The charts are not easy to wear, and can maintain a long-term clear; | |||||||
| * DC light source, light stability; | |||||||
| * Long life, portable, energy-saving and so on. | |||||||
| Specification: | |||||||
| Type of chart: | E chart, astigmatic chart, red/green balance chart | ||||||
| Frame material: | Aluminium alloy | ||||||
| Light source: | LED | ||||||
| Distance of testing: | 5m | ||||||
| Range of testing: | from 4.1 to 5.3 | ||||||
| Record of vision: | five points record, decimal record, fraction record | ||||||
| Size: | 902 * 302 * 17mm | ||||||
| Gross weight (1pc) | 2.4kg | ||||||
| Packing size (1pc): | 100 * 37 * 7.5cm | ||||||
| Gross weight (5pcs): | 13.2kg | ||||||
| Packing size (5pcs): | 104 * 39 * 46cm | ||||||
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