Logitech Trackman Marble Mouse

Trackball design with a long broad palm area and gentle curves keeps hand fortable and supported all dayCompatible with left or right handed use Forward and backward buttons make Web browsing easier and more convenientFast accurate control with smooth-tracking Marble optical technologyPatented technology provides smooth tracking on almost any surface USB or PS2 port connectionPC and Mac patibleCompatible with Windows Vista XP and Mac OX X 10.3.9 or laterIncludes USB-to-PS/2 adapter