Updated November 2026
Data from the official Eufy and Reolink sites.
2026 verdict
One cable for power and data, or no cable at all?
If you can run Ethernet, the Reolink Duo 3 PoE is the better buy, a 4K dual-lens camera with a 180 degree view on a rock-solid wired link. It costs less, is sealed to IP67 against IP65, carries a 2-year warranty against 1 year and records 24/7 to microSD or an NVR with RTSP and no subscription. The Eufy Cam S4 is the wire-free alternative: a battery with solar charging, 32GB of built-in storage plus microSD, Alexa support and a pan-tilt telephoto that follows movement next to its fixed wide lens. Both shoot 4K with color night vision and work with Google Home and Home Assistant. Choose the Reolink Duo 3 PoE for a permanent wired install, and the Eufy Cam S4 where no cable can reach.
Works with
Connectivity
- Wi-Fi 2.4 GHz
vs
Winner
22% OFF
$178.49
$229.99
Works with
Connectivity
- Ethernet
News by email
Still comparing? Get what's new by email
New releases and the smart home news worth knowing, in your inbox.
No spam. Unsubscribe in one click.
| Feature | Eufy Cam S4 | Reolink Duo 3 PoE | Winner |
|---|---|---|---|
| Price | $349.99 | $178.49 | Reolink Duo 3 PoE |
| Warranty | 1 year | 2 years | Reolink Duo 3 PoE |
| Weather Resistance | IP65 | IP67 | Reolink Duo 3 PoE |
| PoE | NO | YES | Reolink Duo 3 PoE |
| Solar Charging | YES | NO | Eufy Cam S4 |
| Storage | Internal, MicroSD Card Slot, Cloud | MicroSD Card Slot | Eufy Cam S4 |
| Alerts | Motion, People, Animals, Vehicles, Familiar Faces | Motion, People, Animals, Vehicles | Eufy Cam S4 |
| Multiple Lenses | Triple (fixed wide + dual-lens pan-tilt zoom) | Dual (180° panoramic) | Tie |
| Rating | 4.2 | 4.2 | Tie |
| Connectivity | 2.4 GHz WiFi | Ethernet | Tie |
| 2K Video | YES | YES | Tie |
| 4K Video | YES | YES | Tie |
What the differences mean
Connection and power
The Reolink Duo 3 PoE takes power and data over one Ethernet cable and has no Wi-Fi, so it never drops but must be cabled. The Eufy Cam S4 runs on battery and solar over 2.4 GHz Wi-Fi, so it goes anywhere the signal reaches.
How it covers the scene
The Reolink Duo 3 PoE shows a fixed 180 degree panorama at all times. The Eufy Cam S4 pairs a 130 degree wide lens with a telephoto that pans 355 degrees to zoom on movement, reaching further in one direction at a time.
Recording
The Reolink Duo 3 PoE records 24/7 to microSD or a Reolink NVR. The Eufy Cam S4 records to 32GB built in or microSD, and keeps a 24/7 history only when wired to power.
Build and warranty
The Reolink Duo 3 PoE is rated IP67 with 2 years of warranty, the Eufy Cam S4 IP65 with 1 year.
Alexa
The Eufy Cam S4 works with Alexa as well as Google Home and Home Assistant. The Reolink Duo 3 PoE supports Google Home and Home Assistant but not Alexa.
Which one to buy if
- you can run Ethernet to the mounting spot
The Reolink Duo 3 PoE gets power and a stable connection from one cable and records 24/7.
- the spot has no power and no cable run
The Eufy Cam S4 runs on its battery and charges from the sun.
- you run an NVR or Blue Iris
The Reolink Duo 3 PoE records continuously over a wired link that NVR software handles well.
- you use Alexa
Only the Eufy Cam S4 works with Alexa.
$349.99
- + Solar Charging: YES
- + Storage: Internal, MicroSD Card Slot, Cloud
- + Alerts: Motion, People, Animals, Vehicles, Familiar Faces
- - Price: $349.99 vs $178.49
- - Warranty: 1 year vs 2 years
Winner
22% OFF
$178.49
$229.99
- + Price: $178.49
- + Warranty: 2 years
- + Weather Resistance: IP67
- - Solar Charging: NO vs YES
- - Storage: MicroSD Card Slot vs Internal, MicroSD Card Slot, Cloud
What owners say
Owners of both cameras praise sharp 4K footage, clear color night vision and recording locally with no fee. Eufy Cam S4 owners single out the dual-lens tracking, which holds the wide view while the second lens zooms and follows, plus solar charging and helpful Eufy support; their complaints are dropouts on crowded 2.4 GHz networks, a heavy app and vehicle detection that misses on long driveways. Reolink Duo 3 PoE owners, many upgrading from a Duo 2 or from battery systems, describe a 180 degree picture that replaces two cameras, a PoE link that never drops even in high winds and smooth NVR and Blue Iris integration, while warning about a fiddly mount, manual aiming only and RTSP that has to be switched on first.
Frequently Asked Questions
Which is better: Eufy Cam S4 or Reolink Duo 3 PoE?
The Reolink Duo 3 PoE for a wired install: it costs less, shows 180 degrees in 4K, records 24/7 locally and has IP67 sealing and a 2-year warranty. The Eufy Cam S4 is better where you need battery and solar power, Alexa or a pan-tilt zoom.
Does the Eufy Cam S4 support PoE like the Reolink Duo 3 PoE?
No. The Eufy Cam S4 runs on battery with solar charging or on wired power, and connects over 2.4 GHz Wi-Fi. The Reolink Duo 3 PoE is powered over Ethernet and has no Wi-Fi.
Do the Eufy Cam S4 and Reolink Duo 3 PoE need a subscription?
No. The Reolink Duo 3 PoE records to microSD or an NVR and has no cloud plan, while the Eufy Cam S4 records to 32GB built in or microSD, with cloud storage optional. Both support RTSP.
Can the Eufy Cam S4 and Reolink Duo 3 PoE record 24/7?
The Reolink Duo 3 PoE records 24/7 out of the box. The Eufy Cam S4 keeps a 24/7 history only when wired to power, and records motion events on battery.
Who should buy the Eufy Cam S4?
Homeowners who need 4K coverage where no cable can reach, want solar charging, built-in storage, Alexa and a lens that tracks and zooms.
Who should buy the Reolink Duo 3 PoE?
Anyone who can run Ethernet and wants one camera to cover a wide driveway or yard in 4K, recording 24/7 to local storage with no fee.
Spotted something wrong on this page? Tell us and we will fix it.
Our store on AmazonShop our ideas on AmazonLists of the smart home setups we would put together ourselves, ready to add to your Amazon cart.Shop on AmazonFull comparison table
Compare all 151 Cameras side by side
You are looking at two of them. The full table lines up all Cameras in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 151 Cameras
- 67 specs compared
- 64 filters
- Cameras
Window Camera E10
- Cameras
OMVI X16 PoE
- Cameras
Ring Indoor Cam
- Cameras
Floodlight Cam Wired Plus
- Cameras
Pan-Tilt Indoor Cam
- Cameras
OMVI 2i PoE
- Cameras
Smart Outdoor Camera
- Cameras
Indoor Cam Plus
- Cameras
Nest Cam Indoor (Wired, 3rd Gen)
- Cameras
Tapo C260
- Cameras
Nest Cam (indoor, wired)
- Cameras
Ring Outdoor Cam
- Cameras
Tapo C200
- Cameras
Tapo C210
- Cameras
Mini Pan-Tilt
- Cameras
Spotlight Cam Plus
- Cameras
Mini 2
- Cameras
Ring Outdoor Cam Plus
- Cameras
Tapo C320WS
- Cameras
Tapo C500
- Cameras
4G Camera S230
- Cameras
4G LTE Cam S330
- Cameras
Cam S3 Pro
- Cameras
Cam S330
- Cameras
eufyCam C35
- Cameras
eufyCam C37
- Cameras
Indoor Cam C120
- Cameras
Indoor Cam E220
- Cameras
Indoor Cam E30
- Cameras
Indoor Cam S350
- Cameras
Outdoor Cam E210
- Cameras
Outdoor Cam E220
- Cameras
PoE Bullet-PTZ Cam E50
- Cameras
SoloCam E30
- Cameras
SoloCam E42
- Cameras
SoloCam E50 (S340 Next-Gen)
- Cameras
SoloCam S220
- Cameras
SoloCam S230
- Cameras
SoloCam S340
- Cameras
TrackLight Cam S1
- Cameras
4MP Indoor
- Cameras
Altas PT Ultra
- Cameras
Argus 4 Pro
- Cameras
Argus MagiCam
- Cameras
Argus PT Ultra + Solar Panel
- Cameras
Duo 2V PoE
- Cameras
Duo 3 WiFi
- Cameras
E1 Pro
- Cameras
Elite Floodlight WiFi
- Cameras
OMVI 2i PoE
- Cameras
OMVI 2i Ultra
- Cameras
OMVI 3i PoE
- Cameras
OMVI X16 PoE
- Cameras
RLC-810A
- Cameras
RP-PCT8MD
- Cameras
TrackFlex Floodlight WiFi
- Cameras
TrackMix PoE
- Cameras
TrackMix WiFi
- Doorbells
Battery Video Doorbell (2nd Gen)
- Doorbells
Doorbell WiFi