Asus RT-N66U & RT-N66R "Dark Knight" Gigabit Routers with power supply for the RT-N66U. Up for sale is a matched pair of classic Asus "Dark Knight" routers: the RT-N66U and its retail variant, the RT-N66R. One unit includes their official power supply adapter, the other does not. They take different power adapters but are easily found on-line. They are well-known workhorses in the networking community and are perfect for homelabbers, tinkerers, and privacy hobbyists.Note: The "U" and "R" models share identical internal hardware; the "R" is simply a retail-channel box label for the exact same unit.Why These Rule for Hobbyists & Open Source Firmware - While past their prime for gigabit-plus wireless speeds on a modern primary ISP connection, these routers feature a powerful MIPS architecture with massive community backing. They are legendary platforms for flashing custom, open-source firmware:Alternative Firmware Support: Easily flashable to third-party builds like FreshTomato, DD-WRT, or Asuswrt-Merlin.No-Risk Learning: Great secondary devices to practice flashing, build custom firewall rules, set up VPN clients (OpenVPN), or configure advanced network telemetry without risking your main household gateway.Perfect for IoT Device IsolationSmart home gadgets (bulbs, plugs, cheap cameras) love to phone home and pose security risks. Use these routers to lock down your network:Network Segmentation: Flash with custom firmware to create isolated VLANs or distinct guest subnets.Traffic Control: Restrict smart home devices from accessing your main LAN or block unwanted WAN outbound telemetry at the router level.Dedicated Smart-AP: Set one up as an isolated secondary access point exclusively for untrusted IoT Wi-Fi clients while keeping your primary network clean and secure.-Condition Used, tested, and fully functional. Cosmetically clean with normal light scuffs from desk placement.