Compact WiFi - Add 802.11n (Wi-Fi 4) Wireless N network connectivity at up to 150Mbps in an incredibly small package. Perfect to upgrade an older computer or bypass a broken wireless card. 2.4GHz support only. Does not support 5GHz WiFi Windows Compatible - Driver downloads provided for Windows 10/11, 8.x, and 7. Not compatible with Win RT. Uses the Realtek RTL8188EUS chipset. Automatically installs in Windows 10 and 8.x with another active network connection. Drive built into Windows 11 Backwards Compatibility - Backwards compatible with Wireless G/B networks and USB 1.1 ports. Supports Ad-hoc and Infrastructure modes. Please note: Windows 11, 10 and 8.x do not support using wireless adapters to create a hotspot (Ad-hoc network) 2 Year Warranty - We love our Plugable products, and hope you will too. All of our products are backed with a 2-year limited parts and labor warranty as well as Seattle-based email support