Video Doorbell Comparison · UK 2026
eufy Video Doorbell S4 vs eufy Video Doorbell C31
Specs, pros and cons compared side by side
Both the eufy Video Doorbell S4 and the eufy Video Doorbell C31 are video doorbells. This head-to-head sets them side by side using the specs, pros and cons from our full reviews. eufy specs come from eufy’s own product pages. If you hardwire a doorbell, turn off the power at the fuse box or breaker before touching any wiring, and use a qualified electrician if you are not sure.
Quick verdict
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eufy Video Doorbell S4
Pick it for: 3K (3072 x 3072) with a 180° x 180° view (the C31: 2K, 4:3 or 16:9 extended) · eufy Chime 2 included (the C31: no chime in the base box) · 4GB built in plus SD cards up to 1TB (the C31: microSD up to 128GB)
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eufy Video Doorbell C31
Pick it for: Removable 6,500mAh battery, or wired (the S4: wired only) · Works with an existing mechanical chime (the S4 bypasses it, so it no longer sounds)
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Quick comparison
| Spec |
eufy Video Doorbell S4 |
eufy Video Doorbell C31 |
| Resolution |
3K (3072 x 3072), 180° x 180° view |
2K, 4:3 or 16:9 extended |
| Power |
Wired only (16-24V AC, 10-40 VA) |
Removable 6,500mAh battery, or wired 16-24V 30VA (24/7 when wired) |
| Wi-Fi |
2.4GHz and 5GHz (Wi-Fi 6) |
Not stated by eufy |
| Storage |
4GB built in; SD card up to 1TB (not included); eufy HomeBase (not included) |
microSD up to 128GB, HomeBase S380 |
eufy Video Doorbell S4
Pros
- 3K video with a 180° x 180° head-to-toe view
- Colour night vision with dual spotlights
- Comes with a eufy Chime 2
- Local storage with no monthly fee: 4GB built in, plus an SD card slot
- Radar and dual PIR detection
- 2.4GHz and 5GHz Wi-Fi 6 (Irish spec table)
Cons
- Wired only: needs existing doorbell wiring and a 16-24V AC, 10-40 VA transformer (eufy’s S4 user guide)
- Your existing chime is bypassed and no longer sounds (eufy’s S4 user guide)
- Apple HomeKit needs a HomeBase S380, per eufy’s Irish and US pages
- In other smart home apps, live view is fixed, without VR Mode or OmniTrack (eufy’s Irish page)
eufy Video Doorbell C31
Pros
- 24/7 recording when wired
- Removable battery
- Works with existing mechanical chimes
- microSD storage
Cons
- Single camera (no package view)
- No chime in the base box
- Not the old eufy Wi-Fi Chime
- No HomeKit
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Which should you buy?
Why choose the eufy Video Doorbell S4
- 3K (3072 x 3072) with a 180° x 180° view (the C31: 2K, 4:3 or 16:9 extended)
- eufy Chime 2 included (the C31: no chime in the base box)
- 4GB built in plus SD cards up to 1TB (the C31: microSD up to 128GB)
Why choose the eufy Video Doorbell C31
- Removable 6,500mAh battery, or wired (the S4: wired only)
- Works with an existing mechanical chime (the S4 bypasses it, so it no longer sounds)
Related comparisons
Need a hand with this?
If the wiring, transformer or power supply is beyond a DIY job, it is worth having a qualified electrician look at it. You can compare up to 3 quotes from local electricians.
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