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Power Supply

AC Input : 110V~240V(50~60Hz) DC Output : 12 V with max. 1 A current

AC Input : 110V~240V(50~60Hz) DC Output : 19 V with max. 1.75 A current

AiProtection

• Malicious Site Blocking, • Infected Device Prevention and Blocking

• Router Security Assessment, • Malicious Site Blocking, • Two-Way IPS, • Infected Device Prevention and Blocking

Wireless

UTF-8 SSID, WiFi MAC Address Filter, Wireless Scheduler, Airtime Fairness, RADIUS Client, Universal Beamforming, Explicit Beamforming

UTF-8 SSID, WiFi MAC Address Filter, • Maximum MAC Filters : 64, Wireless Scheduler, Airtime Fairness, RADIUS Client, Universal Beamforming, Explicit Beamforming

Memory

128 MB Flash 256 MB RAM

WAN

Internet connection Type : PPPoE, PPTP, L2TP, Automatic IP, Static IP, Dual WAN, Port triggering, DMZ, DDNS

Internet connection Type : PPPoE, PPTP, L2TP, Automatic IP, Static IP, Dual WAN, 3G / 4G LTE dongle, Port forwarding, • Maximum Port Forwarding Rule : 64, Port triggering, • Maximum Port Triggering Rule : 32, DMZ, DDNS, NAT Passthrough : PPTP, L2TP, IPSec, RTSP, H.323, SIP Passthrough,PPPoE relay

IPv6
IPv4
WiFi 5 (802.11ac)
WiFi 4 (802.11n)
IEEE 802.11g
IEEE 802.11b
IEEE 802.11a

Package Content

RT-AX55 RJ45 x1 Adapter x1 QSG x1 Warranty Card x1

RT-AC66U Dual Band 3x3 802.11AC Gigibit Router RJ-45 cable Power adapter Quick start guide Warranty card

Product Weight (g)

374g

660 g

Traffic Control

• Bandwidth Limiter, Traditional QoS, Traffic Monitor, • Real-time Traffic Monitor, • Wired Traffic Monitor, • Wireless Traffic Monitor

Adaptive QoS, • Bandwidth Monitor, • Bandwidth Limiter, -- Maximum Bandwidth Limiter Rule : 32, Traditional QoS, -- Maximum Traditional QoS Rule : 32, Traffic Monitor, • Real-time Traffic Monitor, • Wired Traffic Monitor, • Wireless Traffic Monitor, Traffic Analyzer, • Traffic Analysis Period : Daily, Weekly, Monthly, • Website History

AiMesh

AiMesh, • Primary AiMesh Router, • AiMesh Node

Product Dimensions

230 x 134 x 56 mm (WxDxH)

219 x 151 x 47 ~ mm (WxDxH) (Without Bezel)

Parental Control

"Allow you to block access to unwanted websites and apps.", Customized Internet Schedule

LED Indicator

Power x 1 2.4G x 1 5G x 1 LAN x 1 WAN x 1

Power x 1 Wi-Fi x 2 WAN x 1 LAN x 4

Security

Open system, WPA/WPA2/WPA3-Personal, WPA/WPA2-Enterprise, WPS, Let's Encrypt, SSH, Firewall

AiProtection, Open system, WPA/WPA2-Personal, WPA/WPA2-Enterprise, WPS, SSH, Firewall, • Maximum Firewall Keyword Filter : 64, • Maximum Firewall Network Service Filter : 32, • Maximum Firewall URL Filter : 64

Guest Network

"The Guest Network provides Internet connection for guests but restricts access to your local network."

"The Guest Network provides Internet connection for guests but restricts access to your local network.", • Maximum Guest Network Rule : 2.4GHz x3, 5GHz x3, Guest Network Connection Time Limit, Guest Network Encryption : Open system, WPA/WPA2-Personal

USB application

File System : HFS+, NTFS, vFAT, ext2, ext3, ext4, HDD Hibernation, Safely Remove Disk, AiCloud, Download Master, AiDisk, Media Server, Time Machine, Samba Server, FTP Server, Shared Folder Privileges

Operating Frequency

2.4GHz / 5GHz

2.4G Hz / 5 GHz

Antenna

External antenna x 4

External antenna x 3

Administration

Configuration Backup and Restore, Diagnosis tools, Feedback System, System Log

Boosts Speed

OFDMA (Orthogonal Frequency Division Multiple Access) Beamforming: standard-based and universal 1024-QAM high data rate 20/40/80 MHz bandwidth

Transmit / Receive

5GHz 2x2
2.4GHz 2x2

5GHz 3x3
2.4GHz 3x3
MIMO technology

LAN

DHCP Server, IGMP Snooping, IPTV, Manually Assign IP Address, Wake on LAN (WOL)

DHCP Server, IGMP Snooping, IPTV, Manually Assign IP Address, • Maximum Manually Assign IP Address Rule : 64, Wake on LAN (WOL)

Product Segment

AX1800 ultimate AX performance : 1201 Mbps+ 574 Mbps

Buttons

WPS Button, Reset Button, Power Switch

WPS Button, Reset Button, Power Button

Operating Mode

Access Point, AiMesh Node, Media Bridge, Repeater, Router

Accesspoint, AiMeshnode, Mediabridge, Repeater, Router

Processor

1.5GHz quad-core processor

I/O Ports

RJ45 for Gigabits BaseT for WAN x 1, RJ45 for Gigabits BaseT for LAN x 4

RJ45 for 10/100/1000 BaseT for WAN x 1, RJ45 for 10/100/1000 BaseT for LAN x 4 USB 2.0 x 1 USB 3.0 x 1

WiFi Data Rate

WiFi 6 (802.11ax) (5GHz) : up to 1201 Mbps
WiFi 6 (802.11ax) (2.4GHz) : up to 574 Mbps
WiFi 5 (802.11ac) : up to 867 Mbps
WiFi 4 (802.11n) : up to 300 Mbps
802.11g : up to 54 Mbps
802.11b : up to 11 Mbps
802.11a : up to 54 Mbps

WiFi 5 (802.11ac) : up to 1300 Mbps
WiFi 4 (802.11n) : up to 450 Mbps
802.11g : up to 54 Mbps
802.11b : up to 11 Mbps
802.11a : up to 54 Mbps

VPN

VPN Client L2TP, VPN Client Open VPN, VPN Client PPTP, VPN Server IPSec, VPN Server Open VPN, VPN Server PPTP

VPN Client L2TP, VPN Client Open VPN, VPN Client PPTP, VPN Server Open VPN, VPN Server PPTP

- The actual transfer speed of USB 3.0, 3.1, 3.2, and/or Type-C will vary depending on many factors including the processing speed of the host device, file attributes and other factors related to system configuration and your operating environment.
- Actual data throughput and WiFi coverage will vary from network conditions and environmental factors, including the volume of network traffic, building material and construction, and network overhead, result in lower actual data throughput and wireless coverage.
- Quoted network speeds and bandwidth based on current IEEE 802.11ac specifications. Actual performance may be affected by network and service provider factors, interface type, and other conditions. Connected devices must be 802.11ac-compatible for best results.
- The actual transfer speed of USB 3.0, 3.1, 3.2, and/or Type-C will vary depending on many factors including the processing speed of the host device, file attributes and other factors related to system configuration and your operating environment.
- Actual data throughput and WiFi coverage will vary from network conditions and environmental factors, including the volume of network traffic, building material and construction, and network overhead, result in lower actual data throughput and wireless coverage.
- Quoted network speeds and bandwidth based on current IEEE 802.11ac/802.11ax specifications. Actual performance may be affected by network and service provider factors, interface type, and other conditions. Connected devices must be 802.11ac/802.11ax compatible for best results.
- WPA/WPA2 enterprise is only available on single router, is not available under AiMesh mode.
- When traditional QoS is enabled, there will be limitations due to the actual Internet service bandwidth and different environment, and there may be a risk of speed reduction.
- Due to the different power supply requirements on USB external hard disk and 4G/5G Modem device, to ensure that the external device can be used stably, if the USB external device exceeds the standard USB 2.0 (5V/500mA) and USB 3.1 Gen 1 (5V/900mA) power supply requirements, you need to use it with an independent external power supply.
- If you use the product in conjunction with a third party service, you are responsible for complying with the third party provider's terms and conditions and privacy policy and are also at the risk of such use. ASUS does not provide support or guarantee continuous integration support for products that are not part of ASUS.
- For models with Time machine support, starting with macOS 26 (Tahoe), Time Machine no longer supports creating new backups on USB-connected storage devices. Existing Time Machine drives that were previously configured remain compatible and can continue to be used for backup and restoration.