I am confused about the configuration. Do I just connect 1 unit to the router and the other 2 connect via wi-fi or do I have to ethernet to all 3 unit

You can do either. However if you do use ethernet for all 3 there might be a problem if you connect more than one directly to the router or via a switch. It can create a network loop. So if you do want to use ethernet for more than one unit, connect the second and third ethernet cables between units. Each unit has 3 ethernet sockets, so you can do this. I think that if you have a switch that does detect loops you don't have to worry, but my switches didn't work.

I have an out building approximately 30m from the back of my hse and 60m from the router. Can this be used to extend my Wi-Fi to the out building?

I have installed this mesh system in my home. It works very well in the house, and at the bottom of the garden. The distance from the nearest mesh boxes is about 35metres. I have testing the signal strength and it is good. No guarantees that it will work across the distances in the questioner's situation but I have been very happy with this system.

Can you setup multiple wifi networks ssids eg I have one for devices and one for people (so I can change the people password but not have to reset all

Yes, we use main network for peoples gadgets, TVs, laptops, Firestick etc Then Guest network at 2.4 GHz only for smart devices like cameras, doorbell etc. Easy to do too

Mercusys Halo H50g 3 Pack Ac1900 Wifi Extender Booster Dual

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Description

🚀 Elevate your home network—fast, flawless, and future-ready Wi-Fi for the connected professional.

EFFORTLESS APP CONTROL - Intuitive MERCUSYS app lets you set up, manage, and optimize your network with ease—perfect for busy pros.
SEAMLESS WHOLE HOME MESH - One unified Wi-Fi network with automatic device roaming—never lose signal while moving around your space.
GIGABIT WIRED CONNECTIONS - Each Halo unit offers 3 full gigabit ports for ultra-fast, stable wired device connections.
BLAZING FAST DUAL BAND WI FI - Up to 1.9 Gbps speeds to power over 100 devices simultaneously without buffering or lag.
ROCK SOLID STABILITY SECURITY - Advanced beamforming, six signal amplifiers, and WPA3 encryption keep your connection strong and secure 24/7.

The Mercusys AC1900 Whole Home Mesh Wi-Fi System (Halo H50G 3-pack) delivers seamless, high-speed Wi-Fi coverage up to 6,000 ft², supporting over 100 devices with dual-band speeds up to 1.9 Gbps. Featuring full gigabit ports on each unit, advanced mesh technology for uninterrupted roaming, and easy app-based setup and management, it’s designed to eliminate dead zones and buffering in busy modern homes. Backed by a 3-year warranty and robust security protocols, this system is a reliable, scalable solution for professionals demanding fast, stable connectivity everywhere.

Specifications

ASIN	B09C7JDYJ1
Antenna Location	Home
Best Sellers Rank	3,531 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 16 in Whole Home & Mesh Wi-Fi Systems
Box Contents	Halo H50G(3-pack)
Brand	MERCUSYS
Brand Name	MERCUSYS
Colour	Multicolour
Compatible Devices	Gaming Console, Personal Computer, Smartphone, Streaming Device
Compatible devices	Gaming Console, Personal Computer, Smartphone, Streaming Device
Connectivity Protocol	WiFi, Ethernet
Connectivity Range	6000 Square Feet
Connectivity Technology	Ethernet
Control Method	App, Remote
Controller Type	Switch
Country of Origin	China
Coverage	6,000 ft² (550 m²)
Customer Reviews	4.4 out of 5 stars 1,070 Reviews
Data Transfer Rate	1900 Megabits Per Second
Frequency	5 GHz
Frequency Band Class	Dual-Band
Frequency band class	Dual-Band
Has Internet Connectivity	Yes
Is Modem Compatible	Yes
Item Dimensions L x W x H	8.9L x 8.8W x 8.9H centimetres
Item Weight	1.06 Kilograms
LAN Port Bandwidth	1000 Mbps
Manufacturer	MERCUSYS
Manufacturer Part Number	Halo H50G(3-pack)
Maximum Upstream Data Transfer Rate	1900 Megabits Per Second
Model Name	Halo H50G
Model Number	Halo H50G(3-pack)
Model name	Halo H50G
Number of Ports	3
Operating System	RouterOS
Other Special Features of the Product	Access Point Mode
Product Warranty	3 year manufacturer
Router Network Type	wireless
Security Protocol	WPA2-PSK, WPA3
Special feature	Access Point Mode
Unit Count	3.0 count
Wi-Fi Generation	Wi-Fi 5
Wireless Compability	802.11ac
Wireless communication standard	802.11ac

Reviews

A**S

15.08.2023

C**E

2.12.2025

J**R

10.05.2023

L**Y

10.05.2023

A**B

17.01.2024

B**K

12.09.2022

J**S

4.03.2026

R**R

25.03.2025

S**E

21.01.2026

M**O

11.02.2026

A**I

8.07.2024

C**O

15.10.2023

M**A

5.05.2023

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MERCUSYS Halo H50G(3-pack) AC1900 WiFi Extender Booster,Dual Band Mesh WiFi System,TP-Link Router,VPN Encryption WiFi Booster,APP Control,Guest Network,Gigabit Ports,Easy Setup,Parental Control

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