Logitech M-M35 3-Button 9-Pin Serial Mouse Vintage RS-232 DB9 PC DOS Windows

Logitech M-M35 3-Button 9-Pin Serial Mouse Vintage RS-232 DB9 PC DOS Windows

The Logitech M-M35 is a classic three-button mechanical ball mouse that connects via a 9-pin DB9 RS-232 serial port. Made in China and FCC-certified, this mouse features the traditional beige form factor of the late 1980s and early 1990s computing era, with a contoured housing, three distinct buttons, and a fixed attached serial cable terminating in a female DB9 connector.

Specifications & What's Included

• Manufacturer: Logitech
• Model: M-M35
• Buttons: 3
• Tracking: Mechanical ball
• Interface: RS-232 serial (9-pin DB9 female connector)
• Cable: Fixed, attached wired cable
• Power: 12V bus-powered via serial port (no separate power supply needed)
• Compliance: FCC Part 15, CE, UL, CSA
• Country of Manufacture: China
• Includes: Mouse with attached DB9 serial cable only — no box or documentation

Applications

The RS-232 serial mouse was the standard pointing device for IBM PC-compatible computers through much of the late 1980s and into the mid-1990s, before PS/2 and USB interfaces displaced it. The 9-pin DB9 serial connector plugged directly into the COM1 or COM2 port on PC/XT/AT and later 486- and early Pentium-class machines, and was compatible with DOS, Windows 3.x, Windows 95, and Windows 98. Logitech's serial mice were widely used in professional and office environments and were recognized for their reliable mechanical ball tracking and sturdy build. Today, these serial mice are sought by vintage computer enthusiasts restoring period-correct DOS gaming rigs, early Windows workstations, IBM PS/2 systems, and similar retro hardware — and are also useful for any operator still running legacy industrial or scientific equipment with an RS-232 COM port.