How many devices can the Deco S4 support simultaneously?

The Deco S4 is capable of providing connectivity for up to 100 devices.

What is the coverage area of the TP-Link Deco S4 WiFi system?

The TP-Link Deco S4 WiFi system can cover homes up to 3,800 sq. ft.

double click image to zoom in

TP-Link Deco Whole Home Mesh WiFi System (Deco S4) - Up to 3,800 Sq.ft. Coverage, WiFi Router and Extender Replacement, Parental Controls, 2-Pack

A New Way to WiFi: Deco Mesh technology gives you a better WiFi experience in all directions with faster WiFi speeds and strong WiFi signal to cover your whole home.
Better Coverage than traditional WiFi routers: Deco S4 2 units work seamlessly to create a WiFi mesh network that can cover homes up to 3,800 sq. ft. No Dead Zone anymore.
Seamless and Stable WiFi Mesh: Rather than WiFi range extender that need multiple network names and passwords, Deco S4 allows you to enjoy seamless roaming throughout the house, with a single network name and password.
Incredibly fast AC1900 speeds makes the deco capable of providing connectivity for up to 100 devices.
With advanced Deco Mesh Technology, units work together to form a unified network with a single network name. Devices automatically switch between Decos as you move through your home for the fastest possible speeds