I bought a couple of these to use on my 23 inch monitors at the office and they are extremely effective. become almost completely dark. Unfortunately, like all screen privacy filters, they are quite expensive, but they were still some of the cheapest filters I could find and they don't seem to suffer for their price. .The double sided tape included in the box was pretty basic. When installed correctly, the tape doesn't affect picture quality and isn't visible at all, which is nice. The tape was removed from the sheet and pasted onto the monitor, but it only took a few minutes. Would happily buy them again if I needed screen privacy filters.
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