SparkFun Blackberry Trackballer Breakout

The SparkFun BlackBerry Trackballer Breakout gives you easy access to a trackball which measures up, down, left, and right movements, clicks on the board, as well as adding a bit of flair to your project with four built-in LEDs. The trackballer breakout can be hooked into an Arduino compatible device to provide you with an intuitive direction controller.