The keyboard itself won't be able to send anything over the network. A malicious keyboard driver could, but it doesn't have anything to do with the hardware com

The keyboard itself won't be able to send anything over the network. A malicious keyboard driver could, but it doesn't have anything to do with the hardware component. Well, technically the keyboard could broadcast the recorded keystrokes via WiFi or Bluetooth granted it has additional hardware built-in, but that would make things significantly more difficult for the attacker.