This is the most efficient way to configure your Wavlink AC1200 extender with a router. You must first confirm that your wireless router supports the WPS button. To obtain lateral information, please carefully read the following instructions. 

Start by plugging the Wavlink extender's power plug into a power outlet. The Wavlink extender device's indicator LED will then stop blinking steadily after previously being steady. To continue with the Wavlink AC1200 setup process, press and hold the WPS button on the router's rear for six seconds. The Wavlink extender's inner WPS button needs to be pressed after two minutes of waiting. After that, both devices' WPS LEDs will start to pulse in a solid blue pattern. If this message appears, a successful connection between the extender and the router was made after pushing the WPS buttons on both devices.

You should make sure that your router and extension are placed close to each other if the WPS LED is not blinking steadily. Adjust the extension to the proper position to solve the issue. You'll be able to fix the problem.