Used. Like new condition.

https://www.asus.com/us/networking-iot-servers/wifi-routers/asus-wifi-routers/rt-ac66u-b1/

About this item
1GHz CPU powers dual-band 3x3 802.11ac Wi-Fi technology for speeds up to 1750Mbps and wide, responsive coverage for large homes. Coverage area - 3,000 square feet.Antenna : External antenna x 3. Transmit/Receive : MIMO technology , 2.4GHz 3x3, 5GHz 3x3.
Monitor and manage your network with ease from your mobile device using the intuitive ASUS Router App; Firewall：SPI intrusion detection,DoS protection
Effortless router setup with ASUSWRT web-based interface. OS Support - Linux,Windows 8,Windows 10,Windows 7 ,Mac OS X or higher,Windows 8.1,Windows XP
Integrated USB 3.0 and 2.0 ports enable printer sharing throughout your network and remote file access with AiCloud 2.0 support
AiProtection Powered by Trend Micro provides multi-stage protection from vulnerability detection to protecting sensitive data