Connect the Wavlink extender to the newly installed router network. It would be good to know that the network name and password for both the router and the extender are same. If connected successfully, the device will extend the network with seamless network speed. However, you may use the extended networks on your device's Wi-Fi manager if you're not using an actual Wi-Fi router just to have smooth-roaming. These files go by the name: "_Ext". However, it will utilize the same password as with the primary networks. Should your Wavlink router setup be done, enjoy your WiFi coverage. If not, go take a quick check around for another setup.
