@MichaelS Hello, how do you want to connect them to each other? By wired cable or wireless? To get better performance, it is suggested to connect them to the main router directly by wired cable if...

@manim Thanks for your requesting, we will do some troubleshooting first to narrow down the issue and try to fix it. You mentioned that you are case 2, so the speed from the adapter when they are in...

@Pipkins Yes, correct. Only one adapter need to be plugged into the router directly, and others, including the powerline adapter and powerline extender ( powerline adapter with wifi function) can be...

@Bristol71 What is the model number of the powerline adapters? Please connect your computer to the main adapter which connects to the router by wired cable and test whether you can get internet. If...

@pinghung Then pair them separately to make two different network segments. In other word, plug two adapters which in the same segments first and use the pair button to pair them; once you finished...

@Stev1394 Hello, for your information, all the TP-Link powerline adapters are compatible with each other. You can read this article to get some information....