The Singleton is a single sip/puff joystick that emulates a USB or Bluetooth mouse, keyboard or game controller. The mouthpiece attaches through Luer fitting that can include an optional filter for multi-user applications. Replacement mouthpieces are inexpensive and available in two styles.
The Singleton makes use of the Quadstick's pattern recognition ability to use sips and puffs along with specific movements to produce a variety of mouse and keyboard functions.
More information: http://www.quadstick.com/shop/quadstick-singleton