
Only one of two packages was sent to me. It doesn't stay on your computer even if you follow the instructions carefully. And according to Consumer Reports, if it doesn't work. They also don't tell you how much blue light it should block, but consumer reports found it doesn't block a significant amount of blue light unless a product is colored yellow. The seller also didn't respond to emails so he must know he is deceiving the buyer! I completely ignored my references to their product and their product isn't worth a penny!

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