The KODAK IMOUSE Q50. It incorporates the palm grip design where each user can rest his entire hand over the mouse. This design encourages users to move their cursor by rotating the track ball using their thumb and reduces the need of hand movement. It is cable-free by utilizing the 2.4 GHz radio frequency technology, offering a wireless range of up to 30 feet. It's also fully programmable, meaning every mouse button can be customized to your preferred function with its programmable driver. With its 5 levels of DPI resolutions (400-4800), the optical trackball provides superior accuracy and smooth motion, reducing hand movement and space.