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USB is rather high bandwidth for a general wireless adapter to be available. They do get tried now and then, but are never around in large numbers or for very long. A wired extension is easy to get hold of and cheap though.
Do your friend have issues other than sight? It might be better for them to put the effort into learning where all the keys are so they don't need to rely on vision and can use normal keyboards. It's a skill that anyone who does plenty of typing soon acquires. |
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