Maximum flexibility for maximum wireless coverage the asus usb ac55 is a dual band 80211ac wi fi adapter with a usb 30 connection that brings high performance wireless networking support to desktop and notebook pcs the usb ac55 features a usb 30 connection with support for wireless data rates up to 400 mbps at 24 ghz and 867 mbps at 5 ghz with compatible routers suitable for use with both desktop and notebook pcs the usb ac55 features a dual internal antenna design for great wireless