MB521-5G [V1] | 5G AX3000 Wireless Dual Band Router
MB521-5G
5G AX3000 Wireless Dual Band Router
Reliable high-speed connectivity
—anywhere you live, work, or travel.
5G Cellular Networks - Pioneering the Next Wave of Innovation
With massive MIMO, optimized OFDM, and more, 5G technology delivers higher multi-Gig peak data speeds, ultra low latency, more reliability, and increased network capacity. Join the pros and experience the sheer performance of next-gen cellular networks.
Up to
31×
Faster than 4G-LTE Cat4
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5G
4.67 Gbps
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4G-LTE Advanced Cat6
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4G-LTE Cat4
Superior 5G Speed and WiFi 6 for Reliable WiFi‡
Working as a 5G router, MB521-5G effortlessly converts a 5G/4G signal into WiFi and share it with multiple devices. Whether you're streaming, gaming, or attending video conferences, enjoy a seamless and uninterrupted online experience!
Dual Connectivity, Always Online.
Two Antenna Modes, Powerful Signal.
By connecting your extra 5G/4G antennas to the external antenna ports, you may further strengthen the signal.
Antennas
Connect up to 256 Devices
Easy Setup and Management via the MERCUSYS App
Set up and manage your WiFi through the MERCUSYS app.
Unlock More Handy Features
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Guest Network
Provides a separate network for guests to ensure your security and privacy.
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Data Settings
Set a maximum data limit to prevent overspending and monitor your monthly usage with the Monthly Data Statistics feature.
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Messaging
Set up the Message Center to access SMS features and receive alerts when nearing your data limit.
Parental Controls
Set effective policies to ensure your children enjoy safe and responsible internet access.
†Maximum wireless signal rates are the physical rates derived from IEEE Standard 802.11 specifications. Actual wireless data throughput and wireless coverage, and quantity of connected devices are not guaranteed and will vary as a result of network conditions, client limitations, and environmental factors, including building materials, obstacles, volume and density of traffic, and client location. ‡Use of Wi-Fi 6 (802.11ax) and its features including OFDMA, MU-MIMO, and 1024-QAM requires clients to also support the corresponding features. §Maximum 5G/4G download speeds depend on external factors such as the local 5G/4G network coverage, data plan, real-time network capacity, client limitations, and environmental factors. Actual supported frequency bands may vary slightly in different regions due to certification. △SIM card sold separately. This device requires an activated SIM card without a PIN lock. If the SIM is locked, please consult the Quick Installation Guide for unlocking instructions. *Actual network speed may be limited by the rate of the product's Ethernet WAN or LAN port, the rate supported by the network cable, internet service provider factors, and other environmental conditions. **EasyMesh-compatible products can network with other devices that use EasyMesh. Failed connections may be due to firmware conflicts of different vendors. The EasyMesh-compatible function is still being developed on some models and will be supported in subsequent software updates. This product is compatible with standardized EasyMesh technology but has not obtained the WiFi EasyMesh certification.
MERCUSYS Helps You Set Up in A Few Steps
Without any technical know-how or reading complicated instructions, simply follow the in-app instructions. Set up your mesh network in minutes.
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Halo Power Cable Ethernet CableStep 1
Find what you’ll need in the box
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Step 2
Plug in your devices
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Step 3
Follow the on-screen directions with the MERCUSYS app
Manage Your WiFi in Real Time
With the MERCUSYS app, experience live network management. See who’s connecting to your network and manage it at any time with your iOS or Android devices.

Notice: The configuration page of different models may be different, please refer to the actual one.
Powerful Parental Controls
Easily manage your kids’ online time and content to create a safe and healthy online environment.
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Create User Profiles
Create a profile for each family member you would like to manage. Assign devices to the profile to set access controls and time limits for them.
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Online Time Limits
Set daily limits on how long your kids spend online and prevent them from accessing the internet on their devices for a long time to build a healthy network habit.
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Block Inappropriate Websites
Control which sites your kids visit by setting a block list.
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Pause Internet Connection
Suspend family members’ internet connections to take a break from the virtual world to enjoy some family time.
Manage and Secure Your Home Network
The MERCUSYS app helps you manage your WiFi at home or away through your iOS or Android devices.
Check the Status of Connected Devices
Intuitively view the working status of your Halo network and see what is connected. Prioritize or block devices as needed.
Quality of Services
Prioritizes devices you select to perform better.
New Device Access Alert
The MERCUSYS app proactively sends out an alert to inform you when an unfamiliar device is connected. Tap to block the device if it is a security risk.
Set Up a Guest Network
Provides a separate network for guests to ensure your security and privacy.
Everything in One App
Whether you’re looking to control a wide range of MERCUSYS routers, extenders, or Halo mesh systems, find it all on the app.
See what’s compatibleCompatible Products
Note: The device's firmware requires the latest version. Click here to learn how to upgrade your firmware.
Note: Both listed and higher hardware versions of these models are compatible with the MERCUSYS app.
Supporting Multiple Languages
MERCUSYS app supports up to 26 languages, enabling easy network management for users all over the world.
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English
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Nederlands
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Français
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Deutsch
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Italiano
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日本語
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한국어
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Português
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Español
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繁體中文
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Русский язык
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Português Brasil
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Español
(Latinoamérica) -
Български
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Українська мова
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Polski
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Română
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Slovenčina
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ไทย
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Türkçe
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Čeština
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Tiếng Việt
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Eλληνικά
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Bahasa Melayu
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Magyar
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עברית
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Cellular
| Cellular Standards | 5G: 4.67/1.25Gbps DL/UL |
|---|---|
| Cellular Bands | 5G:n1/n3/n5/n7/n8/n20/n28/n38/n40/n41/n75/n76/n77/n78 |
| SIM | 1× Nano SIM Card Slot |
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Wireless
| Wi-Fi Class | AX3000 |
|---|---|
| Wi-Fi (2.4 GHz) | 574 Mbps |
| Wi-Fi (5 GHz) | 2402 Mbps |
| Wireless Standards | IEEE 802.11ax/ac/a/b/g/n |
| Reception Sensitivity | 5 GHz: |
| Max Channel Width | 160 MHz |
| MAX Capacity | 256 |
| Recommended Clients Limit | 128 |
| Wireless Security | WPA-PSK / WPA2-PSK / WPA3-SAE/WPA2-Enterprise |
| Wireless Functions | Smart connect WPS Wireless Schedule Wireless Clients Statistics Easymesh Multi-SSID |
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Software
| Operation Modes | 5G/4G/3G Router Wireless Router |
|---|---|
| Cellular Mode | 5G Preferred 5G Only 4G Preferred 4G Only 3G Only |
| Cellular APN | Data Roaming |
| WAN Mode | Dynamic IP |
| DHCP | Server DHCP Client List Address Reservation |
| NAT Forwarding | ALG Virtual Server Port Triggering UPnP DMZ |
| Protocols | IPv4 IPv6 |
| IPTV | √ |
| Guest Network | 2.4 GHz Guest Network 5 GHz Guest Network |
| Data Settings | Data Statistics |
| Parental Controls | Time Control Website Filtering |
| VPN Sever | Open VPN |
| DDNS | DynDns |
| VPN Client | Open VPN |
| SMS | Inbox New Message Outbox Drafts |
| QoS | √ |
| Easy Mesh | √ |
| Security | IPv4 SPI Firewal Service Filtering Access Control IP & MAC Binding IPv6 Firewall |
| Kill Switch | √ |
| ISP Feature | TR-069 |
| System | Time Settings |
| Diagnostics | Internet connection test |
| LED Management | LED Control Night Mode |
| Device Management | MERCUSYS APP Web GUI |
| Cloud | Firmware Upgrade over the Cloud Remote Management |
| Language | Czech |
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Hardware
| Dimensions (W X D X H) | 190 × 130 × 69.7 mm (7.5 × 5.1 × 2.7 in) |
|---|---|
| Interfaces | 1× GE LAN/WAN Port |
| Antenna | Internal |
| Button | WPS, Reset Button |
| Installation | Desktop |
| LED | 1× POWER |
| Retail Package Dimension | 250 × 240 × 89 |
| Units per Carton | 12 |
| Carton Dimension | 540 × 510 × 250 |
| Power Consumption | 12V/2A |
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Others
| Certifications | CE |
|---|---|
| Network Services Enabled by Default | Web Server UPnP |
| Package Contents | 5G AX3000 Wireless Dual Band Router (MB521-5G) |
| Environment | Operating Temperature: 0 °C~40 °C (32 °F~104 °F) Storage Temperature: -40 °C~60 °C (-40 °F~140 °F) Operating Humidity: 10%~90% Non-Condensing Storage Humidity: 5%~90% Non-Condensing |








