The smallest wireless USB keyboard available, a mere 6" x 2.4" x 0.5" (152mm x 59mm x 12.5mm), it's small but usable to make a great accompaniment to a computer such as the Beagle Bone or Raspberry Pi. The keyboard itself is battery powered (there's a rechargeable battery inside that you charge up via the included USB cable). The keyboard communicates back to the computer via 2.4 GHz wireless link (not Bluetooth).The unit also features a built-in laser pointer which makes it perfect for presentations.
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.