High-speed wireless Internet connectivity The ASUS PCE-AC51 Wireless-AC PCI Express Adapter provides superior Wi-Fi performance for server backbone and switching infrastructure applications, as well as mainstream desktops and notebooks. Using the convenience of a standard PCI Express connector, it delivers wide compatibility, fitting any x1, x2, x8, or x16 slot. Compared with standard PCI network cards, it offers increased bandwidth, reliability and functionality, allowing you to enjoy faster and more stable connections. Downloading, VoIP, video streaming, and online gaming all benefit from its high-speed design and powerful antenna, which ensure long range wireless coverage. The friendly user interface further allows you to install and use the device as well as network applications quickly and easily. Flexible Dual-band Connection Wireless-AC dual-band adapter allows your PC to connect to 2.4GHz for basic Internet application or 5GHz for lag-free streaming and high performance networking through dual-band wireless router.