PS2 To USB Keyboard Adapter M/f-Retail $15.87! Sale Only $5.39!

Customer Reviews:
A tutorial on USB to PS / 2 Adapter
OK, people listen. There are two types of USB - PS / 2 adapter. There are those that simply changing a plug for others. It does not signal any change - just a silent plug. For most of you, this will not work because to use a PS / 2 keyboard with a USB port in the back of your computer, the card needs to change the signal a bit. "That's why the cards can be more expensive - about $ 12 to $ 15 to see. These circuits have to change its internal PS / 2 keyboard output into a signal that the USB port of your computer recognizes. I learned the hard way also .
ALTERNATIVE Adapter
The description here does not tell the whole story. Member site of the manufacturer:
"This product is designed as a replacement adapter for keyboards that originally shipped designed with a PS / 2 USB. If not provided with a converter, you can try one USBPS2PC instead."
I think this is because the other guests that the product does not complain. I'll buy that USBPS2PC "", which I found on Amazon (product number B00028OP2Y).
Frustration
This USB-PS2 "adapter" are the worst thing ever to come from people. Why? You just switch the wires on a different plug. You do not "magically" make products compatible with USB PS2 or vice versa. Rarely is it says the product description. Many people have bought this, have very disappointed that do not work. On the other hand, if you know you have a compatible keyboard that work well. Pay says that the keyboard is compatible with PS2-USB adapter before you buy an adapter! The format conversion work is actually done with the keyboard, not the "Adapter".