Monoprice Ethernet Over Power Powerline Converter

Does this need an extra peripheral to use? Like, do I need to plug a separate converter into the router before I plug these in?

Features:This HDStream Kit includes two Wireless N Powerline Access Points (AP). When plugged into the same electric circuit and paired, the APs can transmit Ethernet data signals over the electrical wiring at speeds up to 200Mbps to distances up to 300 meters!

I have a similar setup. You plug one adapter near your router and run an Ethernet cable directly to it from the router.

Plug the other adapter in where you want the Internet signal.

Huh, okay. I got this a few weeks ago from woot!, but I can’t figure out how to set it up. I thought maybe I needed another powerline box that converts the signal, and then these expand that. IDK.