The Sinefine 4 Ports USB PCIe Expansion Card is a compact and easy-to-install add-on card that allows desktop PC users to expand their USB connectivity by adding 4 additional USB 3.0 ports 2 USB-A and 2 USB-C through an available PCIe slot. It supports data transfer speeds of up to 5Gbps per port, making it ideal for connecting high-speed storage drives, audio devices, and other peripherals. No external power adapter is required, and it's compatible with PCIe X1, X4, X8, and X16 slots, as well as Windows 7/8/10/11 and Linux systems. The card also features built-in power supply control technology supporting up to 25W charging with PD 2.0/3.0, BC 1.2, and AFC protocols.

Installation is straightforward, simply power off your PC, insert the card into an empty PCIe slot, secure it with a screw, and power back on. Windows 10 and above don't require any additional drivers, making it plug-and-play for most modern systems. It's compatible with a wide range of popular desktop builds from Dell, HP, Asus, Gigabyte, MSI, and Corsair, among others. Note that it is designed for standard-size desktop cases and does not support low-profile or mini PC chassis without the included low-profile bracket variant.