You need to first set the device up in order to use it
To do this, please do the following
Connect the range extender to your computer using an Ethernet cable
Plug the range extender into a power outlet.
Disable the Wi-Fi functionality on your computer.
Open a web browser and enter "http://Belkin.range" in the Address bar then press [Enter].
Once in the Belkin N600 Dual-Band Plug-In Wi-Fi Range Extender's web-based setup page, click the Get Started button.
Select your 5 ghz wireless network then click Next.
When prompted, enter your wireless network's password ***** click Next.
Select your 2.4 ghz wireless network then click Next.
Click Create Extended Network.
You should have successfully set up your N600 Dual-Band Plug-In Wi-Fi® Range Extender now and can disconnect it from the computer and connect it to the power socket
Let me know please how you go.