Wireless keyboards use Bluetooth Wireless technology to communicate between the keyboard and the host computer. Bluetooth technology allows computer input devices to be located upto 100m from the master device.
Bluetooth® Compatible Wireless Mobile Keyboards for Apple iPad and Windows 8 Tablet Computers
Bluetooth-Compatible Keyboard, Backlit with Touchpad
Dual Connectivity USB or Bluetooth Fully-sealed Keyboard
Dual Connectivity USB or Bluetooth Fully-sealed Keyboard (Low Profile)
Wireless IP68 Sanitizable Small Footprint Medical Keyboard with Touchpad