Qnap - Qwa-Ac2600 Dual-Band Ac2600 Wireless Pcie Expansion Card (QWA-AC2600) - Interface: PCI Express 2.0 x1, Network Standard: IEEE 802.11b/g/n 2.4 GHz, IEEE 802.11a/n/ac 5 GHz, Antenna: 4 x Dual-band RP-SMA Antennas, Operating Frequency: 2.4 GHz / 5 GHz Dual-band dual-concurrent, Dimensions (H x W x D): 160 x 90.3 x 20.6 mm