What's in the box:

PCI-E 1X Adapter Card PCI-E to 4 PCI-E Ports Expansion Card Converter Card with USB3.0 Cable Power Cable for Windows/Mac (Standard)

Features:
Simultaneously support 4 PCI-E 1X devices, non-interference.
Compliant with PCI-E 2.0&1.1 specification.
Easy installation, plug and play, convenient and efficient.
Goldfinger design, good electrical conductivity, strong oxidation resistance ability.
Reduced burden on the motherboard by simultaneous power supply from big 4Pin and SATA slots.
Compatible with Windows, Linux and Mac.

Specification:
Color: Blue
Transmission interface: PCI-E 1.0, PCI-E 2.0, PCI-E 3.0
Power supply interface: Big 4Pin, SATA 15Pin, 6Pin
Operating system: Windows/Linux/Mac
USB cable length: 60cm
Expander board size: 9.9 * 8.4 * 1.2cm / 3.9 * 3.31 * 0.47in
PCI-E card size: 12 * 6.5 * 2.2cm /4.72 * 2.56 * 0.87in

Packing list:
1 * PCI-E card
1 * PCI-E slot board
1 * USB3.0 cable
1 * Power cable
1 * Bag of screws