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Review title: Do not buy these unless you know what they are for!
Product review: These work good at whatever it is they do, I'm sure. I purchased them under the pretense that I could use them to convert my 1080 p tv to a second screen for my laptop. Simply put, it doesn't work. That is not the manufacturer's fault, but don't listen to techies that claim they'll work (especially certain 'Geeks').
