Features: 4 slots that offer great extension capacity. It connects directly to the board without any extension cables, it can be fixed to the for case. PCI-E slot power solution, no for extra power cable needed. Just one wire to the slot, easy and convenient to install. With IC heat radiator. Specifications: Main chip: ASMedia 1806 Bus Port: PCI-E X4 USB ports quantity: 4 x USB 3.0 Size: approx. 120X66X21mm / 4.72X2.6X0.83 inch Color : Green Features: With low profile bracket, for 2U chassis. Package Size: approx. 130X90X25mm / 5.12X3.54X0.98 inch Compatible operating system: DOS, Linux, for Windows XP / 7/8/10 Note: Due to different monitor and light effect, the actual color of the item may be slightly different from the color shown in the pictures. Thanks Please allow 1-2cm measurement deviation due to manual measurement. Package includes: 1 x PCI-E 1 to 4 adapter card