Wi-Fi Dead Zone Killer Deco E4 is the simplest way to guaranee a strong Wi-Fi signal in every corner of your home up to 2,800 square feet (2-pack). Wireless connections and optional Ethernet backhaul work together to link Deco units, providing even faster network speeds and truly seamless coverage. Want more coverage? Simply add another Deco. Seamless Roaming with One Wi-Fi TP-Link Mesh means Deco units work together to form one unified network. Your phone or tablet automatically connects to the fastest Deco as you move through your home, creating a truly seamless Wi-Fi experience. Multiple 3-in-1 Router, Access Point and Range Extender Modes Flexible and multifunctional, the Deco E4 includes a variety of features allowing it to serve as a router, access point or range extender.Just choose the mode for your actual network demands and experience the maximum wireless flexibility.