Click "Wireless LAN", then click Access Point's "Basic Setting"

Set your Encryption, when press "Apply"

Click "WPS" and press "Apply" ,then click "Initialize"

Also, you could press the button on the side panel of MZK-W300NH

GW-US300MINI2

Click “WPS”, then press “Apply”

GW-US300MINIW

Click “WPS”, then press “Apply”

 GW-US54MINI2

Click “WPS”, then press “Apply”

GW-US300MINIS

Click “WPS”, then press “Apply”