Asus RT-AC51U Wireless-AC750 Dual-Band Router

£ 38.99  inc. vat

£ 32.49 ex. vat

Asus RT-AC51U Wireless-AC750 Dual-Band Router

QuickFind: 719190 Mfr part code: RT-AC51U
  • AC750 complete AC performance : 300+433 Mbps
  • Operating Frequency 2.4 GHz / 5 GHz
  • Antenna, External 5 dBi antenna x 2, Internal PCB antenna x 1

Product Description

Asus RT-AC51U Wireless-AC750 Dual-Band Router

Asus RT-AC51U Wireless-AC750 Dual-Band Router

The Essential AC Upgrade

ASUS RT-AC51U Dual-band Wireless-AC750 router gives you both fast wireless speed and great value to upgrade your home network to the latest 802.11ac Wi-Fi technology today. Experience simultaneous dual-band connectivity and enjoy 300 Mbps speed on the 2.4 GHz frequency and up to 433 Mbps in 5 GHz band. 

Thanks to its multipurpose USB port, RT-AC51U is much more than just a router. Plug in a USB hard disk drive and you’ve got an instant file server â€" and one that extends into the cloud via ASUS AiCloud. Alternatively, attach a USB printer to RT-AC51U to create a print server for sharing one device with several users. The USB even accommodates 3G/4G mobile broadband dongles for two broadband (WAN) connections on one router so you’ll never again have to worry about your internet access going down. The port can even be used for powering gadgets such as smartphones and tablets, making it a handy charging station. 

The easy-to-use ASUSWRT graphical user interface unlocks the power of RT-AC51U giving robust control to optimize your network for you. 30-second setup and easy traffic management means even network newbies can enjoy its sophisticated features, while power users will love its IPv6 support, multiple wireless SSIDs and secure VPN access.

Next gen 802.11ac wireless, up to 3X faster than 1x1 wireless N routers

Powered by 5th generation Wi-Fi (5G Wi-Fi), the 802.11ac chipset gives the RT-AC51U faster wireless speeds than N technology. At 2.4 GHz, it reaches 300 Mbps, while on the 5GHz band it blazes to 433 Mbps. The upgraded bandwidth has the higher capacity you need to increase Wi-Fi enjoyment at home. With notebooks, desktops, pads, and smartphones now all Wi-Fi-reliant, it’s time to upgrade to the next generation to expand you connectivity now and in the future.

Dual-band connectivity for compatibility and performance

Delivering 2.4 GHz and 5 GHz concurrent bands at up to 300 Mbps and 433 Mbps, respectively, the RT-AC51U has a total speed of up to 733 Mbps, and maintains complete stability. Perform basic tasks like Web browsing and file downloading on the 2.4 GHz band, while simultaneously allowing multiple devices to stream in Full HD or support online gaming and other bandwidth-demanding applications smoothly on the clearer 5 GHz band.

No more dead zones with 150% the coverage

Powerful two-way transmission improves Wi-Fi range by 150% compared generic routers, ensuring far-reaching coverage. The unique design of RT-AC51U means a connection you can always rely on.

Add external storage, printers, and other devices to your network

With built-in USB port, connect external storage, printers, and other devices to RT-AC51U and share them throughout your network at once.

Robust control and optimization with ASUSWRT

With the ASUSWRT dashboard UI, setup, monitor, and control network applications all in one intuitive area. On top of 30-second setup, multi-device detection, and flexible settings that make the most of your network performance, it’s been upgraded with quick scanning of USB storage connected to routers to verify data integrity and drive health. Dual WAN enables having two connections/ISPs on one router, with load balance and failover mode for added stability and redundancy to ensure uninterrupted internet access.

Do you game a lot, or spend most of your time streaming videos? Whatever your planned use is, the RT-AC51U has Quality of Service (QoS) standards that let you select how much bandwidth is prioritized for virtually any task. Plus, the traffic monitor allows you to check your Web usage in a clear graphical interface. Try it.

Easy 3-step setup

Use your smartphone, tablet, or PC to effortlessly set up your ASUS router in less than 30 seconds¹ and in only 3 easy steps. Simply connect the cables to the router, open a Web browser, and follow the setup wizard to get you to the internet in no time.

ASUS AiCloud â€" Your world on demand

ASUS AiCloud keeps you connected to your data wherever and whenever you have an internet connection. It links your home network and online Web storage service2 and lets you access it through the AiCloud mobile app on your iOS or Android smartphone or through a personalized URL in a Web browser.

Download and stream anywhere

Download Master and enhanced media server let you download and play multimedia files stored on router-attached USB storage on a wide range of compatible devices such as PC, pad, PS4, Xbox, and smart TV. Download Master can also download files while your PC is turned off, and allows you to manage and monitor download status remotely.

VPN server enabled

Easily set up a VPN server to browse the web and access data â€" no matter where you are. Featuring PPTP encryption, your data transmission remains always secure and confidential.


Network Standard  IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, IEEE 802.11ac, IPv4, IPv6

Product Segment  AC750 complete AC performance : 300+433 Mbps

Data Rate:

802.11a : 6,9,12,18,24,36,48,54 Mbps

802.11b : 1, 2, 5.5, 11 Mbps

802.11g : 6,9,12,18,24,36,48,54 Mbps

802.11n : up to 300 Mbps

802.11ac : up to 433 Mbps


External 5 dBi antenna x 2

Internal PCB antenna x 1

Operating Frequency  2.4 GHz / 5 GHz

Encryption  64-bit WEP, 128-bit WEP, WPA2-PSK, WPA-PSK, WPA-Enterprise , WPA2-Enterprise , Radius with 802.1x, WPS support

Firewall & Access Control:

- Firewall: 

SPI intrusion detection

- Access control: 

Guest access

Parental control

Network service filter

URL/Port filter

VPN Support:

IPSec Pass-Through

L2TP Pass-Through

PPTP server

OpenVPN server

OpenVPN client

WAN Connection Type:

Internet connection type : Automatic IP, Static IP, PPPoE(MPPE supported), PPTP, L2TP

Dual Link support 

Multicast Proxy support


- Download master:

Support BT, NZB, HTTP, ED2K

Support encryption, DHT, PEX and magnet link

Upload and download bandwidth control

Download scheduling 

- Media server:

Image: JPEG

Audio: mp3, wma, wav, pcm, mp4, lpcm, ogg

Video: asf, avi, divx, mpeg, mpg, ts, vob, wmv, mkv, mov

- Professional QoS:


User definable rules for IP/MAC/Port

Upload and Download bandwidth management

ACK/SYN/FIN/RST/ICMP with Highest priority

- Guest Access:

2.4GHz guest network x 3, 5GHz guest network x 3

- Printer Server: 

Multifunctional printer support(Windows only)

LPR protocol support

- File server: 

Samba and FTP server with account management

- Network map

- Traffic monitor


RJ45 for 10/100 BaseT for WAN x 1, RJ45 for 10/100 BaseT for LAN x 4

USB 2.0 x 1


WPS Button, Reset Button, Power Button

LED Indicator:

USB x 1

LAN x 1

Wi-Fi x 1

WAN x 1

Power x 1

Power Supply

AC Input : 110V~240V(50~60Hz)

DC Output : 12 V with max. 1 A current

OS Support

Windows 8 , 32bit/64bit

Windows 7 , 32bit/64bit

Windows Vista , 32bit/64bit

Windows 2000 

Windows XP , 32bit/64bit

Windows Server 2003

Windows Server 2008

Mac OS X 10.1

Mac OS X 10.4

Mac OS X 10.5

Mac OS X 10.6

Mac OS X 10.7

Mac OS X 10.8

Mac OS X 

Linux Kernel (Support Ubuntu only)



Dimensions  189 x 129 x 36 ~ cm (WxDxH)

Weight  270 g

Package Content

RT-AC51U Wireless-AC750 Cloud Router

RJ-45 Cable

Power Adapter

Quick Start Guide

Warranty Card

Support CD (User manual & Utility software)

Router Special Features  3G/4G data sharing, AiCloud, Printer server, Download Master, AiDisK, Multiple SSIDs, Parental Control

Operation mode:

Wireless router mode

Access point mode

Technical Specification

Asus RT-AC51U Wireless-AC750 Dual-Band Router

Expansion / Connectivity

Interfaces WAN: 1 x Ethernet 10/100 - RJ-45 ¦ LAN: 4 x Ethernet 10/100 - RJ-45 ¦ USB 2.0: 1 x 4 pin USB Type A


Frequency Band 2.4 GHz / 5 GHz
Capacity Guest networks: 6
Device Type Wireless router - 4-port switch (integrated)
Enclosure Type Desktop
Connectivity Technology Wireless, wired
Data Link Protocol Ethernet, Fast Ethernet, IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.11n, IEEE 802.11ac
Data Transfer Rate 733 Mbps
Network / Transport Protocol PPTP, L2TP, IPSec, PPPoE, LPR/LPD, FTP
Remote Management Protocol HTTP
Encryption Algorithm MPPE, 128-bit WEP, 64-bit WEP, WPA-PSK, WPA2-PSK, WPA-Enterprise, WPA2-Enterprise
Features Network monitoring, firewall protection, VPN support, Stateful Packet Inspection (SPI), print server, MAC address filtering, IPv6 support, URL filtering, parental control, IP address filtering, download client, Wi-Fi Multimedia (WMM) support, Quality of Service (QoS), Wi-Fi Protected Setup (WPS), IPSec passthrough, Samba support, FTP server, Multiple SSID support, static IP mode, ASUS AiDisk, reset button, bandwidth control, 3G/4G USB Dongle Support, dynamic IP mode, Traffic Control, Multicast Proxy support, VPN Server, ASUS AiCloud, ASUSWRT, Guest Zone support, L2TP passthrough
Compliant Standards IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.1x, IEEE 802.11n, IEEE 802.11ac
Status Indicators Power, WAN, LAN, wireless, USB


Voltage Required AC 120/230 V (50/60 Hz)
Power Device External power adapter


Aerial External integrated and internal
Antenna Qty 3


Cables Included 1 x network cable

Software / System Requirements

OS Required Linux, Microsoft Windows 2000, Apple MacOS X, Apple MacOS X 10.1, Microsoft Windows Server 2003, Apple MacOS X 10.4, Apple MacOS X 10.6, Microsoft Windows Server 2008, Apple MacOS X 10.5, Android, Microsoft Windows Vista (32/64 bits), Ubuntu, Microsoft Windows 7 (32/64 bits), Microsoft Windows XP (32/64 bits), Apple MacOS X 10.7 Lion, Windows 8 (32/64 bits), Apple MacOS X 10.8

Dimensions & Weight

Width 18.9 cm
Depth 12.9 cm
Height 3.6 cm
Weight 270 g

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£ 38.99  inc. vat

£ 32.49 ex. vat

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