This PE3A passive adapter allows you to use your existing PCI-Express Add-in-Card or USB3.0 device in the ExpressCard 2.0 Standard slot

The ExpressCard 2.0 Standard supports the latest versions of the PCI Express and SuperSpeed USB (USB 3.0) specifications by offering transfer rates of up to 5Gbps. The ExpressCard 2.0 Standard supports backward compatibility with previously released products

• ExpressCard Standard Release 2.0 (PCMCIA)
• PCI Express base Specification 2.0
• USB Specification, Release 2.0 Hi-Speed
• USB Specification, Release 3.0 SuperSpeed
• System Management Bus (SMBus) Specification, Version 2.0
• PCI Express Card Electromechanical (CEM) Specification 2.0
• Power output specification: 3.3V/1.3A(Max), 5V/0.9A(Max), 12V/0.2A(Max)

NOTICE:
PE3A is passive adapter. Your notebook PC needs support ExpressCard standard release 2.0. otherwise USB3.0 function can't work properly.
And can't insert PCIe Card and USB3.0 device at the same time. Otherwise USB3.0 function can't work properly