Detailed Product Description -3 buttons MINI mouse with retractable cable. -800 dpi, 2300 FPS- USB port available -Incorporates latest optical technology-Button life over 3,000,000 times-Symmetrical design, suitable for left & right handed users-Dispended with mechanical parts and trackball-Easy Zoom in/out-Compatible with PC, DOS, Windows98/2000/ME/XP/2003/Vista-Safety approval: FCC class B, CE- ...