Add high speed 802.11ac WiFi connectivity to a desktop PC through a PCI Express slot with dual band 2.4 / 5 GHz frequencies and up to 867 Mbps PCI Express AC1200 Dual Band Wireless-AC Network Adapter PCIe 802.11ac WiFi Card Wireless-AC Card 802.11a/b/g/n/ac 2 Transmitter / 2 Receiver (2x2:2) antenna configuration