This keyboard is so cool, imagine typing notes on it while your TR is on inside of your backpack/breifcase/someplace hidden. Sure, you can’t see what you are typing, so there will be many typoes, but wouldn’t it be cool to see the look on people’s faces when you say, “oh, let me type that up” and bust out this keyboard and just start typing. Sure, your tr would have to be on for this to work, but it would be so cool… I found it cheapest here .