Genuine Dell Black 2-Button PS/2 Computer PC Ball Mouse with Scroll Wheel and Cord Part Numbers: F2854, W1668, G4220
Genuine Dell PS/2 Ball Corded Mouse with Scroll Wheel Part Number: W1688. Mouse is plug-n-play, no software required. Model numbers on the package may vary, most are W1668. This is for the mouse only, no manuals, instructions or software is included.