Eufy Video Doorbell S4 Review — 5 Essential Things to Know Before You Buy

The short answer: The Eufy Video Doorbell S4 is the most ambitious video doorbell Eufy has built — a single panoramic 180°×180° camera that replaces the dual-camera approach of the E340, adds 64GB of built-in storage, Wi-Fi 6, AI tracking, and radar detection, all for £229 with no subscription. It was announced at CES 2026 for UK launch by end of March. This is a first look based on confirmed specs and early press reviews — we'll update with hands-on verdict when the S4 ships to UK buyers.

Why the Eufy Video Doorbell S4 Matters

After 20 years in UK security, I've watched the video doorbell market settle into a predictable pattern: Ring and Nest on one side with subscription clouds, Eufy and Aqara on the other with local storage and no fees. Innovation has been incremental — better resolution here, improved night vision there.

The Eufy Video Doorbell S4 is something different. Eufy's own PR lead described it at CES 2026 as "our latest and most advanced doorbell" — and the specs back that up. This isn't an E340 with a spec bump. It's a fundamental rethink of how a doorbell should work.

The key change: abandoning the dual-camera approach entirely in favour of a single 180°×180° panoramic lens that sees both visitors at eye level and packages at doorstep simultaneously. Combine that with AI tracking that automatically zooms in to follow people as they approach, 64GB of on-device storage, Wi-Fi 6, and radar-based motion detection — all at £229 with no subscription — and the Eufy Video Doorbell S4 is the most interesting doorbell launch of 2026.

Eufy Video Doorbell S4 — Key Specs

Eufy Doorbell S4 Panoramic Camera — How It Works

This is the S4's headline innovation and the biggest departure from Eufy's previous dual-camera approach.

The Eufy E340 uses two physically separate cameras — one pointing forward at visitor face level, one angled down at the doorstep. Clever, effective, and the reason the E340 is our most recommended doorbell for parcel delivery. But two cameras means two lenses, two image processors, and a visible seam in the footage where the two streams meet.

The S4 replaces this with a single 180°×180° panoramic lens — 180 degrees horizontally and 180 degrees vertically simultaneously. You see the full width of your entrance and the full height from above the door to the doorstep in a single frame. No seam, no dual stream switching, no dead angles.

OmniTrack AI — how the tracking works:

The S4's OmniTrack feature works similarly to Apple's Centre Stage technology in iPads — as a visitor approaches, the AI identifies them and dynamically zooms and pans within the 180° frame to keep them centred and face-sized in the shot. As they reach the door, the camera tracks them smoothly rather than showing a fixed wide-angle view where a person at 3 metres is a small figure.

In practice at a typical UK doorstep, this means the S4 captures courier faces, visitor approaches, and package drop-offs in a single continuous tracked clip — without the fixed perspective limitations of a standard doorbell.

Eufy S4 Review UK — What Early Testers Say

Because the S4 launched first in the US and international markets before UK availability, we have early press impressions to draw on.

Expert Reviews (UK's leading independent tech publication) called the S4 "Eufy's latest smart video doorbell" that "retains all the features that have made Eufy doorbells a firm favourite." They specifically noted the new design — cylindrical, more refined than previous Eufy models — and highlighted the 64GB of local storage as a standout feature.

T3 Magazine called it "Eufy's best video doorbell to date" that "could give Ring a run for its money." The panoramic lens and OmniTrack AI tracking were specifically praised.

Notable first impression from Eufy's own PR (CES 2026 interview): When asked about the S4 vs E340, Eufy's Brett White acknowledged that the E340's dual-camera approach was "gold" for parcel delivery — but explained that the S4's 180°×180° panoramic solves the same problem through a fundamentally different architecture. Rather than two cameras with separate angles, one camera that sees everything simultaneously.

64GB Storage — Why This Changes Everything

The Eufy E340 has 8GB of built-in storage. The Eufy S330 uses HomeBase 2 with 16GB. The Eufy S4 has 64GB built directly into the doorbell — eight times more than the E340.

At typical doorbell motion event rates (10-15 events per day), 8GB stores around 3-4 weeks of footage. 64GB stores many months — potentially the entirety of a UK rental period or more. This is significant for several reasons:

For evidence: You can retrieve footage from three months ago without any cloud subscription. If a parcel was stolen in early April and you notice in June, it's still there. This is genuinely unusual — no other mainstream doorbell offers this without a hub.

For GDPR compliance: The UK ICO recommends retaining CCTV footage for no longer than 31 days in most cases. 64GB means you're never in a position where you're forced into cloud storage or hub installation just to have a reasonable retention period. See our full GDPR guide for what this means in practice.

For renters: No hub means no additional device to install. One doorbell, self-contained, with months of footage. For renters who can't easily install additional indoor devices, this is the most complete subscription-free doorbell ever made.

Wi-Fi 6 — The Practical Difference

Every Eufy doorbell before the S4 uses 2.4GHz Wi-Fi only. The S4 uses Wi-Fi 6 on both 2.4GHz and 5GHz bands.

For most UK homes this is a meaningful upgrade. 2.4GHz Wi-Fi is slower and more congested — in a typical East London street where every house within range is broadcasting on 2.4GHz, connection stability suffers. Dropouts, missed motion events, and choppy live view are common complaints about battery doorbells running on congested 2.4GHz networks.

Wi-Fi 6 uses more efficient spectrum management to handle congested environments better. And 5GHz gives faster throughput for high-resolution video streaming — relevant when you're watching a 3K live feed remotely. For properties where the front door is on the edge of reliable 2.4GHz range, the 5GHz option may make the difference between a doorbell that works reliably and one that doesn't.

For maximum connectivity reliability, the Aqara G400 still offers PoE — a wired Ethernet connection that no Wi-Fi can match. But the S4's Wi-Fi 6 is the next best thing.

Eufy S4 vs E340 — Which Should You Buy?

Choose the S4 if:

• You want AI tracking that follows visitors automatically
• Maximum local storage is a priority (64GB vs 8GB)
• Your front door Wi-Fi is unreliable on 2.4GHz (S4's Wi-Fi 6 helps)
• You want HomeKit support with a Eufy doorbell
• You're happy to pay £70 more for significant feature upgrades

Choose the E340 if:

• You want the proven dual-camera approach (already in production, affiliate link available)
• Budget matters — £160 vs £229 is a meaningful difference
• You don't need AI tracking or HomeKit
• You want a product that's already available and reviewed in real-world UK conditions

Read our full E340 review for the complete picture on Eufy's current best-seller.

Eufy S4 vs S330 — Which Eufy Flagship?

The S330 has Delivery Guard — an active voice deterrent that broadcasts automatically when someone approaches your parcel. The S4 doesn't appear to have this feature based on current specs. If active parcel deterrence is your priority, the S330 remains the better choice. See our full S330 review.

What We Don't Know Yet

As a first look based on press specs rather than hands-on testing, there are things we can't confirm yet:

Real-world OmniTrack performance: AI tracking sounds impressive on paper. Whether it handles the edge cases — a visitor who walks quickly, someone approaching from an extreme angle, a delivery cyclist — requires real UK doorstep testing.

Battery life with AI processing: The OmniTrack AI tracking uses continuous processing. How much this affects battery life vs the S330 or E340 is unconfirmed.

HomeKit compatibility in practice: HomeKit support requires HomeBase 3. How well the S4 integrates with Apple Home vs the Aqara G400's HomeKit Secure Video remains to be tested.

UK doorstep performance: The 180°×180° panoramic view is tested in US and European conditions. Whether the geometry works well for typical UK terraced house doorsteps — often narrow, with steps, at street level — requires UK-specific testing.

We'll update this review with hands-on results when the S4 is available in the UK.

UK Availability — Where to Buy the Eufy Video Doorbell S4

The S4 was announced for UK launch via eufy.com/uk by end of March 2026. As of the date of this article, it is not yet widely listed in UK retail.

To be notified when it's available:

• Visit eufy.com/uk and use the "Notify me" option if available
• Check Amazon UK for listings
• This article will be updated when UK stock appears with a direct purchase link

If you can't wait: The Eufy E340 remains available now at £160 and is our most recommended subscription-free dual-camera doorbell. See our full E340 review. The Eufy S330 is also available with Delivery Guard active parcel deterrence.

My First Look Verdict

Based on specs and early press impressions, the Eufy Video Doorbell S4 is the most technically impressive video doorbell Eufy has made — and arguably the most interesting subscription-free doorbell available at any price in 2026.

64GB of on-device storage, Wi-Fi 6, radar detection, OmniTrack AI tracking, HomeKit support, and a 180°×180° panoramic camera — all for £229 with no monthly fees — represents a significant value proposition if real-world performance matches the spec sheet.

The question marks are real-world OmniTrack performance and battery life under continuous AI processing. These matter and they require UK-specific testing to answer properly.

For now: if you're buying today, the Eufy E340 at £160 is the right choice. When the S4 arrives in UK with an affiliate link and hands-on reviews, this article will be updated with a full verdict.

For the complete context of where the S4 sits in the UK market, see our best doorbell camera guide.

Frequently Asked Questions

What is the Eufy Video Doorbell S4? Eufy's most advanced video doorbell, announced at CES 2026. It features a single 180°×180° panoramic 3K camera with OmniTrack AI tracking, 64GB built-in storage, Wi-Fi 6, radar detection, and HomeKit support — all for £229 with no subscription.

Is the Eufy Video Doorbell S4 available in the UK? It was announced for UK availability via eufy.com/uk by end of March 2026 at £229. This article will be updated with a purchase link when UK stock is confirmed. If you need a doorbell now, see the Eufy E340.

How does the Eufy S4 differ from the E340? The E340 uses dual cameras (one main, one downward-facing for packages). The S4 uses a single 180°×180° panoramic camera with AI tracking that covers the same ground in one lens. The S4 also has 64GB storage (vs 8GB), Wi-Fi 6, and radar detection. See the comparison table above.

Does the Eufy S4 require a subscription? No — like all Eufy doorbells, the S4 has no subscription requirement. The 64GB of built-in storage keeps footage locally with no cloud fees.

Does the Eufy S4 work with Apple HomeKit? Yes — with HomeBase 3 (sold separately or in bundles). This makes it one of the few Eufy doorbells with HomeKit support. For comparison, see our HomeKit doorbell guide.

What is OmniTrack on the Eufy S4? Eufy's AI tracking system that automatically zooms in and follows visitors as they approach the door, keeping them centred in the frame throughout their approach. Similar in concept to Apple's Centre Stage feature. Whether real-world performance matches the promise requires hands-on UK testing.

⚠️ This is a first look article based on confirmed specifications and press previews. We'll update with hands-on UK test results and a purchase link when the Eufy Video Doorbell S4 is available in the UK.

Last updated: June 2026. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.