Add 4 USB (Universal Serial Bus) 3.0 ports to your desktop computer through a PCI Express expansion slot Super Speed USB (Universal Serial Bus) 3.0 connectivity at up to 5 Gbps & 80% more power than USB (Universal Serial Bus) 2.0 Dual profile design to fit into Full or Low Profile/small form factor (SFF) systems Uses a SATA power connector for compatibility with newer systems that have limited or no LP4 power supply connections, to ensure maximum power for USB (Universal Serial Bus) devices The PEXUSB3S4 4-Port PCI Express Super Speed USB (Universal Serial Bus) 3.0 Card (with SATA Power) adds 3 external USB (Universal Serial Bus) 3.0 ports & an internal USB (Universal Serial Bus) 3.0 port to any PCI Express-enabled computer system. With Super Speed USB (Universal Serial Bus) 3.0, you can reach data transfer speeds up to 5 Gbps, while still being backward compatible with existing USB (Universal Serial Bus) 2.0 devices at 480 Mbps. With a built-in SATA power connector, each USB (Universal Serial Bus) port can provide up to 900m A of power to USB (Universal Serial Bus) 3.0 devices (500m A for USB (Universal Serial Bus) 2.0) by connecting to your computer power supply. Compatible with both Low profile/half-height or Full profile computer cases, this card is backed by a Star Tech.com 2-year warranty & free lifetime technical support. WhatÂ’s in the box PCI Express USB (Universal Serial Bus) 3.0 card Low Profile Bracket Driver CD Instruction Manual