TP-Link Deco M5 x2. I have not mapped signal strength across rooms (mostly because their locations are hardstuck because of wiring limitations). Usually less than 20 clients (e.g., phones, tablets, a PC or two, IoT devices). Only 2 other networks sharing my channel (lowest available channel usage). 2.4 & 5 GHz. Walls are standard drywall with wood studs.