USB Ps/2 Adapters

Round-connector keyboards and mice are still in daily use across offices, kiosks, and retro computing setups, and this category holds the small adapters that keep them working on machines built after their ports disappeared. In the adapter corner of the USB product branch, next to printer bridging and PCI expansion hardware, the shelf collects a deceptively simple product.

The listings are adapter bodies with a USB connection on one side and the legacy round input connector on the other. There is little to vary physically, so the real differences sit in the electronics: which keyboard and mouse protocols the adapter passes through, and whether it handles both device types in a single unit or splits them.

Buyers should understand that these adapters translate input protocols, not just connector shapes. That translation is where compatibility problems appear, particularly with gaming keyboards that draw more power or send scan codes a simple adapter cannot carry. Testing against the actual device matters more than reading a spec sheet.

The customer base splits into three groups. Offices keep older keyboards alive during fleet refreshes. Kiosk and point-of-sale builders prefer the positive connection of a round connector over a loose radio link. Retro computing enthusiasts rebuild older machines and need period-correct input hardware.

Sourcing advice favors single adapters that cover both keyboard and mouse, since they halve the part numbers a buyer must carry. Buyers serving industrial keyboards should verify power draw before quoting, since high-draw devices can exceed what a basic adapter passes.

Units arrive in a plain polybag with a small card, and buyers servicing older equipment often quote them alongside printer bridging leads.