I use the products with a "Cherry G84-4100PBADE / 00" which still has the old port. This is a mini keyboard from Cherry what I could bid more cheap on eBay before some years. There is no in principle, only the Windows button and the USB port against the current model of Cherry. The current model costs almost 50, I paid a fraction of that. With this adapter, I can continue to use the keyboard for many years, but by me 5 stars, simple and functional.