这个是wifi 5的。
When used as a Wi-Fi extender, it not only works with any brand of Wi-Fi Router or Internet Provider Wi-Fi Gateway, it creates a Mesh Smart Roaming connection with them, giving you one seamless network across your whole home.
https://www.staples.ca/products/3002407-en-d-link-ac1900-high-performance-scalable-mesh-wi-fi-router