Miniature Wireless USB Keyboard and Touchpad
Add a miniature wireless controller to your computer project with this combination keyboard and touchpad. We found the smallest wireless USB keyboard available, a mere 152mm x 59mm x 12.5mm! It's small but usable to make a great accompaniment to a computer or Raspberry Pi. The keyboard itself is battery powered. The keyboard communicates back to the computer via 2.4 GHz wireless link (not Bluetooth).
The keyboard can only be used with a USB-host such as a computer. Its not intended to be used with an Arduino or Basic Stamp, etc. We tested it with the Raspberry Pi and it works great: uses only one USB port for both mouse and keyboard.