Meet one of the newest models of the Adesso Trackball product line the Adesso iMouse T30. It incorporates the palm grip design where each user can rests 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. Its 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. This mouse trackball is also easy to maintain just push the trackball outward from its back clean it and push it back in place. Its ergonomically contoured large size trackballfurther complete its ergonomic advantages making your daily computing tasks more comfortable and stress-free.