" Wireless" keyboards are keyboards that you don't have a physical wire to connect the keyboard to the computer.
“无线”键盘是没有物理线将键盘连接到计算机的键盘。
英语百科
Wireless keyboard
A wireless keyboard is a computer keyboard that allows the user to communicate with computers, tablets, or laptops with the help of radio frequency (RF), infrared (IR) or Bluetooth technology. It is common for wireless keyboards available these days to be accompanied by a wireless mouse.