What's in the box:

PCI-E to USB3.0 Adapter Card High Speed Transmission Converter Card with 4 USB3.0 Ports Desktop Computer Expansion Card (Standard)

Features:
The USB3.0 port provides up to 5Gbps transmission rate, fast and stable transmission.
4 USB3.0 ports expand the capacity for your computer case, can connect with more devices.
Support hot plugging, instant startup, no need to shut down the system when connecting or disconnecting devices.
Direct power supply by PCI-E interface, no external power cable required, higher stability.
Goldfinger design, good electrical conductivity, strong oxidation resistance ability.

Specification:
Specification:
Type: PCI-E to USB3.0 Adapter Card
Internal interface: PCI-E
Expansion interface: 4*USB3.0
Transmission rate: 5Gbps
Supported system: Windows XP/Win7/Win8/Win10/Linux
Item size: 12 * 6.5 * 5.8cm /4.72 * 2.56 * 2.28in

Packing list:
1 * Adapter card