Here are the wavlink extender setup steps:

Unbox the Wavlink extender and gather all components.
Plug the extender into an electrical outlet near your Wi-Fi router.
Press the WPS button on your router, then press the WPS button on the extender.
Wait for the WPS LED on the extender to become stable.
Connect your device to the "Wavlink-XXX" Wi-Fi network.
Open a web browser and type "ap.setup" in the address bar.
Follow the on-screen instructions to complete the setup.
Enjoy extended Wi-Fi coverage and improved signal strength.