@ilibili 

Where ever you have the RE450 plugged in, the circle LED should be blue, and the 2.4G and 5G will be lit indicating it is connected to the router's network.

If your router is a dual-band, then both small LED lights should be on.

I would recommend having the RE450 broadcast its own wireless network name, rather than use the same name of your router so when you set up your Ring, you know that you are connecting to the extender.

So you would have something like:

Router:

mywifi

mywifi-5G

Extender:

mywifi-ext

mywifi-5G-ext

The easiest way to check would be to download Tether into your smartphone, connect to your Wi-Fi, and open the app to find your extender and modify the extended Wi-Fi names.