... /2 port *CE,FCC,ROHS *OEM logo print Kinds mini ball shape usb mouse Descriptions:*Ergonomic design, grip comfort, flexible operation, is ... , precise positioning, resolution 800DPI*Optical sensors, a precise positioning, applies to any plane*Scroll wheel, press the two in one design ... scrolling and Zoom window function*A variety of colors to choose*PS/2,USB,U+P interface*Compatible with WINDOWS 98/2000 ...