http://weoo.cc/b6zp (Supports AC600 and AC1200 models)
Most Maxesla adapters work with open-source drivers. For Realtek chipsets: maxesla usb wifi adapter driver download
Maxesla often provides direct links on a small card inside the product packaging or via QR codes for those without a CD drive. Verified direct links found in official product listings include: http://weoo