NANDO "AMAZON JUNKY" explained the issue. In order for this device to work, the keyboard must already support USB (dual PS/2 USB connectors). Why would one need a passive converter for the PS/2 connection? KVM? I don't know. Anyway, this product receives a poor review because the casual buyer (me) desires to use an older PS/2 only keyboard on a USB system. An active converter is required. No where in the product description is this limitation defined, nor are there detailed specifications. I wasted $6 (no big deal) and six weeks to discover I needed a different adapter. The vendor issued me an RMA on the basis that the adapter did not identify itself as a HID and sent me another, which also did not meet my needs. Thanks for good service but no thanks for poor product description and not understanding the issue.

Buy Sabrent SBT-PS2U USB to Dual 2-Port PS/2 Splitter Cable Converter instead.

Product shipped was not as advertised. Rather, it was a generic version that did not work.

Item was just as advertised . 1 penny plus s/h. I did not do my due diligence and failed to note in the specs or in the reviews that this item will not work with a keyboard that was not USB compatible. My Bad.

I have tried to use this product with a PS2 mouse connected to USB on a computer and was unable to get it to work. It appears that this product just doesn't work.

This product does not work as I had hoped it would.

It only works with mice or keyboards that are USB compatible....even if the mouse or keyboard is a PS2 item. Thus, these adapters were a waste of my time and money.

The seller has not responded to my inquiry as to why this qualification was not written in their advertising documentation.