How should I choose an anti-peep screen protector for my cell phone?

We need to know that the two important factors that determine the quality of a cell phone anti peep screen protector are the anti peep effect and light transmission rate. A good anti-peek screen protector should have both good anti-peek effect and high light transmission rate. Anti-peep effect is related to the viewing angle, the market anti-peep angle is generally divided into 45 degrees, 35 degrees, 28 degrees, the smaller the number of degrees, the better the anti-peep effect

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