TP-Link Deco S4 AC1900 Mesh WiFi System 3 Pack
- Data transfer rate: 1200 Mbps
- Wi-Fi generation: Wi-Fi 5
- Wireless compability: 802.11ac
- Frequency band class: Dual-Band
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A proven mesh option for replacing a weak ISP router in a multi-floor home, especially when the nodes are wired together for backhaul.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B084GTH5LLModel: Deco S4(3-Pack)Category: Whole Home & Mesh Wi-Fi Systems
Sizes Available
Styles Available
Need a different one? Pick on Amazon →
Overview
The Deco S4 3-pack is a whole-home mesh WiFi system rated for up to 5,500 square feet, replacing a single router and extenders with three units on one network name. Each node has two gigabit ethernet ports and supports wired backhaul.
Setup runs through TP-Link's Deco app rather than a browser admin panel, and one node has to stay wired to the modem to act as the router.
- Mesh coverage up to 5,500 sq ft with three units
- Single network name with seamless room-to-room roaming
- Two gigabit ethernet ports per node, six total, for wired backhaul
- Works with Alexa and any ISP that requires a modem
Who it's for
Fits multi-floor or multi-room homes where a single router leaves dead zones, including households replacing an ISP gateway like a Fios or cable modem/router combo. Less useful in a small apartment or single-floor home where one router already covers the space.
Pros and cons
- Replaces flaky ISP router and extender setups
- Gigabit ethernet ports on every node for backhaul
- One unit must stay wired to the modem
- App-only management, limited for power users
Performance notes
Deco's mesh handles roaming under one network name, moving devices to whichever node has the strongest signal as you walk through the house.
Specifications
| Brand | TP-Link |
|---|---|
| Model | Deco S4(3-Pack) |
| Dimensions & fit | |
| Lan port bandwidth | 1000 Mbps |
| Item Weight | 4.2 pounds |
| Item dimensions l x W x h | 3.6 × 3.6 × 6.4 inches |
| Capacity & performance | |
| Connectivity range | 5500 square_feet |
| Power & efficiency | |
| Voltage | 12 volts |
| Construction & materials | |
| Color | White |
| Compatibility & installation | |
| Connectivity protocol | Ethernet, Wi-Fi |
| Connectivity Technology | Ethernet, Wi-Fi |
| Compatible devices | All WiFi Enabled Devices |
| Included components | |
| Number Of Packs | 3 |
| Unit count | 3 |
| Warranty & support | |
| Warranty description | 2 years |
| Other details | |
| Data transfer rate | 1200 Mbps |
| Wi-Fi generation | Wi-Fi 5 |
| Wireless compability | 802.11ac |
| Frequency band class | Dual-Band |
| Frequency | 5 GHz |
| Maximum upstream data transfer rate | 950 Mbps |
| Security protocol | WPS |
| Number of ports | 6 |
| Control type | Voice |
| Number of antennas | 9 |
| Operating System | Linux |
| Antenna type | Internal |
| Number Of Items | 1 |
| Coverage | 5500 square feet |
| Antenna Location | Home |
| Other special features of the product | Access Point Mode |
| Mfr Part Number | Deco S4(3-Pack) |
| Item Type Name | Whole Home WiFi System |
| Controller Type | amazon_alexa, vera |
Frequently asked questions
Can the units connect by ethernet instead of only wireless?
Yes, each unit has two gigabit ethernet ports and supports wired backhaul, which one reviewer said gave more consistent performance than wireless-only backhaul.