AC1200 Wireless Dual Band USB Adapter Ultra-fast 1200 (867+300)Mbps wireless speed with 802.11ac Dual Band Wireless: 2.4 GHz and 5 GHz band provide flexible connectivity, giving your devices access to the latest dual-band WiFi router for faster speed and extended range. High Gain Antenna: A 2dBi/5dBi high-gain antenna greatly enhances the reception and transmission signal strength