Rechargeable Vision Chart, LED Double-Sided Vision Chart Light Box, Adjustable Brightness, Front 30CM/Back 25CM Measuring Distance, Optometry Equipment

Welcome to my shop~ I wish you a happy shopping:)Product specifications: Name: LED eye chart light box White background average brightness: 80-320CD, m² White background brightness uniformity: >0.85 Charger broadband input voltage: AC 100~240V Output voltage: 4.2V 0.5A Measuring distance: front 30CM/back 25CM Recording method of vision: decimal record/5-point record Package weight: 0.445KG Size: 213*120*15mmPacking list: 1 near eye chart + 1 charging head + 1 charging cable + 1 lithium battery + 1 base + 1 pendant + 1 pendant screw

• 【Eye Chart Light Box】Remotely control the eye chart, adjust the brightness according to the surrounding environment, light, etc., low power consumption, easy to operate. Provides continuous bright lighting to ensure the accuracy of vision testing, and is ideal for professional and personal use.
• 【Adjustable brightness】The brightness of this eye chart is adjustable in two levels. The switch is located on the bottom of the device. The switch is in the middle position to turn off, the right is the first level of brightness, and the left is the second level of brightness. You can adjust it to the appropriate brightness as needed.
• 【Easy to measure】It can easily measure vision up to 14 inches away from the observer, providing a distance equivalent to 20/800 to 20/20. It adopts a hook design for easy hanging and can also be used as a wall decoration. Provides quick and easy eye examinations and vision tests.
• 【LED Eye Chart】Energy-saving LED display, made of high-quality materials, safe, reliable and durable, no reflection, no glare, it is an ideal eye chart for children's vision examinations and gifts. You can also use it to conveniently monitor your and your children's vision.
• 【Best Choice】Perfect eye care gift for optometrists, eye care experts, ophthalmologists, eye care providers, opticians, glasses manufacturers, etc., very suitable for children, students, families, offices and schools.