All the TP-Link Deco Mesh WiFi can work together
Powerline Backhaul: The Powerline Deco P9 adds a third lane for data to travel through, similar to a Tri-band mesh router, to create stronger connections between Deco units and increase the home network's overall performance, eliminating signal interference from thick walls and other objects.
Whole Home WiFi Coverage: Cover up to 6, 000 square feet with seamless, high speed WiFi that eliminates dead zones and buffering. Better than traditional wifi booster.
Intelligent WiFi Mesh Network: Unite your home under a single WiFi name and password while enjoying a seamless connection as you walk from room to room.
Parental Controls: Manage, limit and monitor internet use with parental controls that let you customize WiFi access for every person and device in your home
Easy Setup and Management: The Deco app helps you set up your home network in minutes with clear visual guidance and keeps you in control even when you aren't home.
Works With Alexa: Pair with Alexa to share your guest wifi password, add devices and more using just your voice.
Each Deco P9 has 2 Gigabit Ethernet ports(6 in total for a 3-pack). Any of them can work as a Wi-Fi Router. Works with all internet service providers, such as AT&T, Verizon, Xfinity, Spectrum, RCN, Cox, CenturyLink, Frontier, etc.( a modem is required for most internet service providers)