SPECIFICATIONS : Material: PVC Colors:red, green, purple, blue, orange, pink, yellow, light green. Quantity:8 pieces Size:A4 For Visual Fatigue: Staring at books and computers for a long time is not conducive to eye health, and reading cards can help you create a changeable visual environment when you are visually fatigued. For ADHD: Help children improve their attention and focus their attention on the text they read, which will play an important role in children's learning and growth. For Color Weakness: It is very suitable for people who do not have high sensitivity to color, helping them improve their ability to recognize colors. Guarantee to customers: 1. We comply with Amazon's return policy. 2. If you have any questions about the product, please contact us.
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