Logitech First Mouse Serial Version PC Computer Mouse - OPEN BOX. (No Adapter)

Type: Serial Mouse Connectivity: Serial (RS-232), Wired Number of Buttons: 3 Color: White Features: Ergonomic Tracking Method: Mechanical Maximum DPI: 300 Unit Type: Unit Product is in very good pre-owned physical condition. Includes the manual, instructions, installation disk, and mouse. I believe there is supposed to be an adapter but that seems to be missing. Please let me know if you have any questions or concerns. Thank you.