Deco P9 combines dual-band Wi-Fi and Powerline technology to create a stronger mesh network. The Powerline technology utilizes your home's electrical wiring to establish stronger connections between Deco units, reducing the impact of walls and other obstacles on the signal, and providing even faster network speeds as well as truly seamless coverage. Powerline and wireless connections work together to transmit data between Deco units. The overall network speed is significantly improved compared to using Wi-Fi alone.