Children's products are a very broad market. Especially in terms of protecting eyesight, more and more students use smart phones, excessive eye use causes harm to health, and the myopia rate remains high. Project customers have been rooted in the field of eye protection products for many years, and have previously developed a variety of eye protection lenses and ranging instruments for young people. The goal of this product is to provide primary and secondary school students with a range finder that isolates the blue light of mobile phones. The name is eye protection armor, which means to protect children's eyes like armor. Product function: infrared ranging; Isolate the blue light of the screen and fold easily.