The durable USB plate adapter converts the USB pins from an AT-style Pentium (or newer) motherboard to 2 standard USB A-style sockets - a cost-saving solution that provides the missing link to PCs that have USB capability built-in, but no connectors on the PC to utilize it.
2-IDC (5-pin; Motherboard header) Female connector A
2-USB A (4-pin) Female connector B
Add two standard A-style sockets to the back of computer