Designed for use in your home or office, the D-Link Wireless AC1200 Dual Band PCIe Desktop Adapter helps provides superior wireless reception. This desktop adapter fits into PCI express slots, and increases the bandwidth, the reliability, and the functionality. It allows you to make and receive internet phone calls, surf the web, transfer files, and stream HD media files quickly and easily when connected to a AC router or modem router. With two external antennas, the dual bands help avoid interference and ensure that your internet connection is as strong as possible.