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I bought these for cell phones and laptops, used it on my phone for a few days until I realized that it was the reason that my calls were choppy and sounded slurred and digitized. As soon as I took it off the calls were back to normal. Maybe you want to look into getting a different type? I did notice that it blocked the EMF effectively - I'm an energy healer and tested myself with the phone before and after putting it on. So it was effective in it's mission, just a little too much.