I bought a total of 3 for my sister's iPhone 7, my iPhone 7+ and my wife's iPhone max. Ease of installation. Not sure how many blue lights can be blocked but we're pretty happy. If you need to buy a tempered glass protector, I suggest paying a little more for this item with anti-blue light function for your eyes. One thing to note: the glass turns blue in the sun, but this color doesn't affect the quality of the phone's display.
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