ZyXEL 11ac Dual-Band Wireless AC1200 USB 3.0 Adapter (AC240) 802.11ac technology, backward compatible with 802.11 a/b/g/n, offers concurrent wireless delivers data transfer rates of up to 300 Mbps for 2.4 GHz or 867 Mbps for 5 GHz USB 3.0 bus allows for faster transfer speeds than USB 2.0 AC1200 adapters Dual-band allows you to connect at faster 11ac speeds or to legacy 2.4Ghz 11b/g/n wireless networks Easy setup with Wi-Fi Protected Setup (WPS) Compact design for optimal portability Convenient USB extension cable