Logitech Cube can be used either mouse or presentation device

Logitech Cube mouse innovative design features compact size and shape that fits your hand and your pocket, a tiny grab-and-go mouse. This device will function not only as a mouse but also as presentation device. When you use it as a mouse, Logitech cubemouse scrolls when you swipe your finger along the main panel and when you lift the Cube in the air, it automatically switches to Presenter mode where each click will turn your slide to the next one. 

Logitech Cube mouse features tiny Logitech Unifying receiver that connects up to 6 Unifying compatible devices with very reliable wireless connection up to 25-meter. Basically Cube works with other Logitech Unifying devices without another USB port. Similar to Apple magic mouse, Logitech flow scroll software enables you to slide your finger along the touch surface to experience smooth and continuous flowing web page scrolling. [Images via]