Here we are using the manual method for Wavlink Extender Setup.  So just check on the step-by-step setup guide of Wavlink. 

The wavlink existing WiFi device must be in connection with the Wavlink extender. Just write down the wavlink website address wifi.wavlink.com in the bar of the browser. To access the settings page enter the username and the password. After you will write down the details like Username the devices will start looking for the signals. By clicking on the networks select your home WiFi networks. By putting the WiFi password into space select Next on the Setup. Wait for a minute before you combine the WiFi booster and router. The configuration of the extender is almost complete here. To take the whole benefits of the extender, place the wavlink extender near an area where there is no internet.