Whole House Hybrid Mesh Wi-Fi System TP-Link Deco P9 AC1200+AV1000 Up to 4000 Sq ft Thick Wall Wi-Fi Enhancer Two-Pack of Parental Controls: From the producer Powerline + Mesh WiFi: Communicate Through Walls Deco P9 creates a more robust mesh network by combining powerline and dual-band Wi-Fi. By strengthening the connections between Deco units using your home's electrical wiring, Powerline technology lessens the effect of obstructions like walls.