HP C3751B PS/2 Two-Button Mouse M-S34 Hewlett Packard PC Workstation

HP C3751B PS/2 Two-Button Mouse M-S34 Hewlett Packard PC Workstation

The HP C3751B is a genuine Hewlett Packard two-button PS/2 mouse, model M-S34, manufactured in China. It connects via the standard 6-pin Mini-DIN (PS/2) interface and is rated at 5V DC, 30mA. The mouse body is gray with the HP logo on the top, with two buttons and no scroll wheel.

Specifications & What's Included

• Part Number: C3751B
• Model Number: M-S34
• Interface: PS/2 (6-pin Mini-DIN)
• Number of Buttons: 2
• Color: Gray
• Power: 5V DC, 30mA
• FCC ID: DZL210582
• Certifications: FCC, CE, UL (E145474)
• Country of Manufacture: China
• Includes: Mouse with attached PS/2 cable — no additional accessories

Applications

PS/2 ball mice like the HP C3751B were standard input devices bundled with HP workstations, desktops, and PC-compatible systems from the mid-1990s through the early 2000s. The PS/2 interface — introduced by IBM with the PS/2 line in 1987 — became the dominant mouse and keyboard connector standard on PCs throughout that era before USB took over in the early-to-mid 2000s. These mice are still functional on any machine with a PS/2 port, and PS/2-to-USB adapters make them compatible with modern systems as well. They remain in demand for legacy system maintenance, retro computing setups, and environments where PS/2 input devices are preferred or required.