Microsoft IntelliMouse X03-48591 3-Button PS/2 Mouse 1.1A PS/2 Compatible

Microsoft IntelliMouse X03-48591 3-Button PS/2 Mouse 1.1A PS/2 Compatible 63618-OEM

The Microsoft IntelliMouse X03-48591 is a wired 3-button PS/2 ball mouse, version 1.1A, designed for PS/2-equipped desktop computers. Part number X03-48591, OEM product ID 63618-OEM, it connects via a standard PS/2 (Mini-DIN 6-pin) plug and draws 5V DC at 20mA from the host system's PS/2 port — no external power required. Manufactured by Microsoft Corporation in Mexico.

Specifications & What's Included

• Manufacturer: Microsoft Corporation
• Model: IntelliMouse, Version 1.1A
• Part Number (PN): X03-48591
• Product ID: 63618-OEM
• Interface: PS/2 (Mini-DIN 6-pin connector)
• Number of Buttons: 3 (left, right, center/scroll)
• Power: 5V DC, 20mA (bus-powered via PS/2 port)
• FCC ID: C3KKMPS
• Country of Manufacture: Mexico
• Color: Beige / light gray
• Includes: mouse with attached PS/2 cable

Applications

The Microsoft IntelliMouse line was one of the most widely used PC mouse families of the mid-to-late 1990s and early 2000s, bundled with OEM desktop systems and sold standalone across the Windows 95, 98, NT, and 2000 eras. PS/2-interface mice like this one connect to the dedicated PS/2 mouse port found on virtually every ATX desktop motherboard of that generation. Today they remain in active use on legacy industrial PCs, CNC controllers, test-bench workstations, and KVM switch setups that require PS/2 input devices — PS/2 mice are also valued for their low-latency, interrupt-driven communication compared to USB polling, and many BIOS environments and embedded systems require a PS/2 device for pre-boot input. This mouse is a practical replacement or spare for any system with a PS/2 mouse port.