Compact WiFi: 802.11n (Wi-Fi 4) Wireless N network connectivity up to 150Mbps in a small package; Ideal for upgrading older computers or replacing broken wireless cards; 2.4GHz support only; No 5GHz WiFi support Windows Compatible: Driver downloads available for Windows 10/11, 8.x, and 7; Not compatible with Win RT; Realtek RTL8188EUS chipset used; Automatically installs in Windows 10 and 8.x with another active network connection; Built-in driver for Windows 11