Compared with similar anti blue light screen protector, the biggest advantage of our blue light filter for computer monitor is that it use the same material as anti-blue light glasses. The blue light computer screen protector has at least the following three obvious advantages: First, this computer screen protectors has a very large anti-blue light range. It can perfectly filter out harmful blue light with a wavelength of 400nm-450nm. The biggest reason is that our blue light shield for computer screen use the same material as the anti-blue glasses. This is a huge difference between us and other similar products. Second, the blue light blocking monitor filters has very good light transmittance. The light transmittance of similar blue ray screen protector is generally around 60%, which will cause consumers to have blurred vision when using them. The light transmittance of our products is about 96%, maintaining the original effect of the computer display. Third, our monitor screen protectors have good hardness and scratch resistance. When you accidentally fall on the ground,our monitor filters will not break easily, or when there is dust on it, you wipe it with a towel, the computer monitor blue light filter still maintains the original brightness, without any scratches. It can be seen that the selection and processing of materials for blue-ray products is very critical. Below we briefly introduce the knowledge about Blu-ray: Short-wave blue light is light with a relatively high energy wavelength between 400nm and 480nm. The really harmful part is the part within the wavelength range of 400nm to 450nm. Blue light in this wavelength will increase the amount of toxins in the macular area of the eye, which seriously threatens the health of our eye fundus, especially when you continuously use blue-emitting products such as computer screens for more than two hours. Finally, thank you for your reading and purchase!