Microsoft 92841 MUS4J Beige 2-Button PS/2 Ball Mouse Mouse Port Compatible 2.1A

Microsoft 92841 MUS4J Beige 2-Button PS/2 Ball Mouse Mouse Port Compatible 2.1A

The Microsoft 92841 (model MUS4J) is a classic two-button PS/2 ball mouse designed for IBM-compatible PCs with a Mouse Port–compatible interface. It connects via a Mini-DIN 6-pin (PS/2) plug and uses a mechanical ball tracking mechanism — the standard input technology of the era before optical and laser mice became commonplace.

Specifications & What's Included

• Part Number: 92841
• Model: MUS4J
• Interface: PS/2 (Mini-DIN 6-pin)
• Tracking: Ball (mechanical)
• Buttons: 2
• Protocol: Mouse Port Compatible 2.1A
• Power: 5V, 20mA
• FCC ID: C3KKMP1
• Color: Beige
• Manufacturer: Microsoft Corporation, Made in China
• Certifications: UL, CE, GS, NOM
• Includes: Mouse with attached PS/2 cable only — no additional accessories

Applications

The Microsoft 92841 is a mid-1990s PS/2 ball mouse from the era when the PS/2 port was rapidly replacing the older serial DB9 mouse connector on IBM-compatible desktop PCs. These mice were standard equipment bundled with desktop systems running MS-DOS, Windows 3.x, Windows 95, and Windows 98, and are still used today to maintain legacy workstations, industrial PCs, and older office machines that retain PS/2 ports. They are also sought by collectors and enthusiasts restoring vintage PC systems to original specification. PS/2 ball mice of this type work natively on any system with a 6-pin Mini-DIN Mouse Port, and many are compatible with PS/2-to-USB adapters for use on more modern hardware.