Mini Wireless Keyboard - Black (Adafruit 1737) for Raspberry Pi
Add a good quality, slim keyboard to your Raspberry Pi, Beagle Bone Black or other mini-computer with this sleek black chiclet keyboard. It's a full QWERTY keyboard with a wireless USB dongle and is compatible with all operating systems. We tried many keyboards to find one that felt good for every-day use and didn't take up too much room.
The keyboard is wireless, and the matching dongle connects through a USB port so it works great with just about anything - it shows up just like any other keyboard. 2 x AAA batteries are required but they're included! The dongle has a storage spot in the battery case, so if you're unable to find it, try opening up the battery spot and see if its tucked in there.
To use with a Raspberry Pi, change the keyboard to USA PC104 layout:
Switch to root user.
Run 'dpkg-reconfigure locales' and change from en_GB.UTF-8 to en_US.UTF-8.
Run 'dpkg-reconfigure keyboard-configuration' and change the keyboard to USA PC104 (again, change as needed).