*Ergonomic design ball shape usb mouse *Win 98/2000/NT/ME/XP *support both USB and PS/2 port *CE, ... /2,USB,U+P interface*Compatible with WINDOWS 98/2000/NT/ME/XP Mechanical properties*Switch operating force: 60 ± 15GF*Key ... /PENTIUM*Operating system environments: DOS,WIN95/98/2000/ME/XP/NT*Operating voltage: DC5 ± 5%*Operating current: less than 100MA Technical ...