You can now turn your routers into Wi-Fi mesh with ASUS AiMesh - HardwareZone.com.sg
AiMesh whole home mesh wifi system | ASUS
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Amazon.com: ASUS Dual Band WiFi Repeater & Range Extender (RP-AC1900) - Coverage Up to 3000 sq.ft, Wireless Signal Booster for Home, AiMesh Node, Easy Setup : Electronics