For proper cable lengths

Very good keyboard for my problems. I had to move my keyboard with a long USB extension. I always take this USB repeater. Only my cheap keyboards including "HAMA" do not do that with. You have dropouts. Times it reacts and gets power & time she goes out. This problem disappears with this Logitech keyboard forever. Even with 15m USB extension has no failures and functioning properly since 1.5 years. What bothers me only right at this keyboard is it has only one Windows key on the left side. And thus no to the right! It's annoying when you get used to when you use the Windows button on the right side. But otherwise there is nothing to complain about.