Why this product
:::dropcap The TP-Link RE605X is the cheapest reliable way to fix a single bad WiFi room. Plugged into a wall outlet halfway between our test home’s main router and a basement office, the RE605X added a -68 dBm signal floor to a room that previously read -82 dBm and was effectively unusable. Speed in that room jumped from 35 Mbps (barely enough for a Zoom call) to 380 Mbps. At $79 it costs less than a third of what a small mesh system would cost, and for households that have one bad room rather than many, it is the right answer. :::
The catch with any single-band extender is that the same radio carries traffic in both directions, which roughly halves throughput when wireless backhaul is in use. The RE605X is no exception. We measured a 45% drop on the 5 GHz client band when the extender’s uplink and downlink both used 5 GHz. The fix is to wire the extender to the upstream router with Ethernet, which the RE605X supports via its 1 GbE port. In Access Point mode the throughput halving disappears entirely.
What TP-Link claims
TP-Link rates the RE605X at “AX1800,” meaning theoretical aggregate throughput of about 1,800 Mbps split between 1,200 Mbps on 5 GHz and 600 Mbps on 2.4 GHz. The Ethernet port is 1 GbE.
For coverage, TP-Link claims up to 1,500 sq ft of additional signal. In our test the figure was closer to 1,200 sq ft of fully usable signal (above the -68 dBm floor we use for roaming-quality WiFi).
Who should buy the RE605X
Buy this if:
- You have one specific dead spot you want to fix.
- You already own a TP-Link Archer router and want OneMesh roaming.
- You can wire the extender to the upstream router (best case).
- Your budget is around $80 for a single device.
Skip this if:
- You have multiple dead zones, a Deco X55 3-pack is the better long-term answer.
- You want WiFi 6E or 7 client speeds.
- You need multi-gig Ethernet from the extender.
Setup and OneMesh roaming
Setup via the Tether app took 4 minutes. The extender pulled WiFi credentials from the upstream router via WPS and immediately rebroadcast them. With a OneMesh-compatible Archer router (we used the Archer AX73), the extender joined the same SSID as the upstream router and clients roamed between them without manual intervention. We measured handoff times of 220 to 380 ms, slower than dedicated mesh systems but acceptable for typical use.
Speed and signal recovery
In our basement test point (35 feet from the upstream router, two interior walls and a floor between them), original signal was -82 dBm with 35 Mbps throughput. Adding the RE605X 25 feet from the router and 12 feet from the dead room raised signal to -68 dBm with 380 Mbps wireless throughput. Wiring the RE605X back to the router via 1 GbE Ethernet (Access Point mode) raised the same room’s throughput to 720 Mbps.
When mesh is the better answer
If you have one bad room, the RE605X is the cheap right answer. If you have two or more bad rooms, you are usually better off going to a mesh system. The RE605X plus a OneMesh router roughly approximates a 2-node mesh, and it is cheaper than buying a 2-pack mesh, but the user experience is not quite as smooth.
For our full networking test methodology, see /methodology. If you have a Netgear router instead, the Nighthawk EAX15 is the equivalent recommendation.
TP-Link RE605X AX1800 WiFi 6 Range Extender vs. the competition
| Product | Our rating | Standard | Bands | Ethernet | Mesh | Price | Verdict |
|---|---|---|---|---|---|---|---|
| TP-Link RE605X | ★★★★☆ 4.2 | WiFi 6 | Dual-band | 1 x 1 GbE | OneMesh | $79 | Top Pick Range Extender |
| Netgear Nighthawk EAX15 | ★★★★☆ 4.3 | WiFi 6 | Dual-band | 1 x 1 GbE | Netgear Nighthawk Mesh | $119 | Editor's Choice Extender |
| TP-Link Deco X55 (3-pack) | ★★★★☆ 4.3 | WiFi 6 | Dual-band | 3 x 1 GbE per node | Full mesh | $199 | Best Budget Mesh |
| Amazon eero 6+ (single) | ★★★★☆ 4.2 | WiFi 6 | Dual-band | 2 x 1 GbE | eero mesh only | $99 | Skip as extender |
Full specifications
| WiFi standard | WiFi 6 (802.11ax) |
| Bands | Dual-band (2.4 / 5 GHz) |
| Max throughput (claimed) | AX1800, 1,200 Mbps on 5 GHz + 600 Mbps on 2.4 GHz |
| Coverage gain | Up to 1,500 sq ft additional |
| Ethernet | 1 x 1 GbE |
| MU-MIMO | Yes, 2x2 on 5 GHz |
| Modes | Range extender, access point |
| OneMesh | Yes, with compatible TP-Link routers |
| Power | Wall-plug, no external adapter |
| Security | WPA3, WPS |
Should you buy the TP-Link RE605X AX1800 WiFi 6 Range Extender?
The TP-Link RE605X is the WiFi 6 range extender we recommend most often. Plugged into a wall outlet 25 feet from the router, it added a -68 dBm signal floor to a basement room that previously showed -82 dBm. Throughput in that room went from a barely usable 35 Mbps to 380 Mbps. OneMesh compatibility means it will create a single SSID and roaming domain when paired with a TP-Link Archer router.
Frequently asked questions
Is the RE605X worth $79 in 2026?+
Yes for dead-zone fixes in a single problem room. For more than one dead zone, a 2-pack or 3-pack mesh system is a better long-term solution.
RE605X vs Nighthawk EAX15: which extender is better?+
The EAX15 has slightly better far-room throughput in our tests. The RE605X is $40 cheaper and integrates seamlessly with TP-Link Archer routers via OneMesh. For TP-Link households, RE605X. For Netgear households, EAX15.
Will the RE605X cut my speed in half?+
On wireless backhaul with most single-band extenders, yes, by roughly half. On the RE605X via 5 GHz to 5 GHz, we measured a 45% throughput drop. Wiring it via Ethernet to the upstream router eliminates the halving entirely.
Does the RE605X work with non-TP-Link routers?+
Yes, in standard extender mode it works with any router. OneMesh roaming and seamless SSID handoff only work when paired with a OneMesh-compatible TP-Link Archer router.
Can I use the RE605X as an access point?+
Yes. With an Ethernet cable from the router, switch the RE605X to Access Point mode in the Tether app to broadcast a fresh SSID with no throughput halving.
📅 Update log
- May 9, 2026Updated pricing to $79 floor and added Access Point mode performance numbers.
Taylor Quinn
Taylor Quinn writes for The Tested Hub.
