Winner
20% OFF
$119.99
$149.99
Updated October 2026
Data from the official aosu and EZVIZ sites.
2026 verdict
Best camera, no monthly fee? The aosu Video Doorbell R1 Ultra wins this comparison on connectivity, alert variety and customizable motion zones, and it does it with subscription-free local storage.
Its 5MP sensor and seven-piece glass lens shoot 2K in a 166-degree 4:3 frame with colour night vision, the included aosuBase Mini stores 60 days of clips and doubles as the chime, and it works on both 2.4 GHz and 5 GHz Wi-Fi on battery or wired power. The EZVIZ CP4 is the specialist alternative: a peephole kit with a 4.3-inch indoor touchscreen, a two-year warranty, microSD recording up to 512 GB and a voice changer, but 1080p and 2.4 GHz Wi-Fi only. Pick the aosu Video Doorbell R1 Ultra for the better camera and alerts, or the EZVIZ CP4 if your door has a peephole and you want a screen inside.
Works with
Connectivity
- Wi-Fi 2.4/5 GHz
vs
15% OFF
£109.99
£129.99
Works with
Connectivity
- Wi-Fi 2.4 GHz
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 | aosu Video Doorbell R1 Ultra | EZVIZ CP4 | Winner |
|---|---|---|---|
| Price | $119.99 | £109.99 | EZVIZ CP4 |
| Rating | 4.4 | 4.3 | aosu Video Doorbell R1 Ultra |
| Warranty | 1 year | 2 years | EZVIZ CP4 |
| Connectivity | 2.4 GHz WiFi, 5 GHz WiFi | 2.4 GHz WiFi | aosu Video Doorbell R1 Ultra |
| Alerts | Motion, People, Packages, Familiar Faces | Motion, People | aosu Video Doorbell R1 Ultra |
| Customizable Motion Zones | YES | NO | aosu Video Doorbell R1 Ultra |
| Battery Life | 90 days | 90 days | Tie |
| Integrations | Google Home, Alexa | Google Home, Alexa, Home Assistant | Tie |
| Storage | Internal, Cloud | MicroSD Card Slot, Cloud | Tie |
What the differences mean
Storage
Both avoid a subscription. The aosu Video Doorbell R1 Ultra records to the 8 GB aosuBase Mini in the box, with 60-day loop recording, while the EZVIZ CP4 records to a microSD card of up to 512 GB. The aosu base also serves as the indoor chime.
Image quality
The aosu Video Doorbell R1 Ultra uses a 5MP sensor behind a seven-piece optical glass lens and adds colour night vision. The EZVIZ CP4 is 1080p with black-and-white infrared night vision, so the aosu is the sharper and more colourful camera.
Connectivity
The aosu Video Doorbell R1 Ultra supports both 2.4 GHz and 5 GHz Wi-Fi, which is unusual in this category. The EZVIZ CP4 is 2.4 GHz only, and its alert range is tuned around a 110-degree PIR sensor with a 6-metre reach.
Power
The aosu Video Doorbell R1 Ultra runs on a rechargeable battery or existing doorbell wiring. The EZVIZ CP4 is battery only, with a 4600 mAh pack quoted at 90 days of standby that depends heavily on how busy the doorway is.
Form factor and warranty
The EZVIZ CP4 is a peephole kit that needs an existing viewer hole and replaces it with a camera outside and a screen inside, backed by a two-year warranty. The aosu Video Doorbell R1 Ultra is a conventional camera with a one-year warranty that fits any door.
Which one to buy if
- you want the better camera and colour night vision
The aosu Video Doorbell R1 Ultra pairs a 5MP sensor with colour night vision, where the EZVIZ CP4 is 1080p with infrared only.
- your door already has a peephole
The EZVIZ CP4 replaces the existing viewer and adds a screen inside with no drilling or wiring.
- you want a screen indoors, not just a phone
The EZVIZ CP4 includes a 4.3-inch indoor touchscreen that doubles as the chime.
- the porch has weak 2.4 GHz Wi-Fi
The aosu Video Doorbell R1 Ultra also runs on 5 GHz, which the 2.4 GHz-only EZVIZ CP4 cannot.
- you want the longer warranty
The EZVIZ CP4 carries a two-year warranty against one year on the aosu Video Doorbell R1 Ultra.
Winner
20% OFF
$119.99
$149.99
- + Rating: 4.4
- + Connectivity: 2.4 GHz WiFi, 5 GHz WiFi
- + Alerts: Motion, People, Packages, Familiar Faces
- - Price: $119.99 vs £109.99
- - Warranty: 1 year vs 2 years
15% OFF
£109.99
£129.99
- + Price: £109.99
- + Warranty: 2 years
- - Rating: 4.3 vs 4.4
- - Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, 5 GHz WiFi
What owners say
aosu Video Doorbell R1 Ultra owners repeatedly say the local storage is the reason they bought it, with one describing wanting a doorbell for years but never another monthly fee, and they report easy installs and a 5MP picture that looks better than pricier rivals; the caveats are battery life below the 90-day rating, human detection that misses sometimes and slow support on a damaged unit. EZVIZ CP4 owners praise the peephole install and the indoor screen, and they value that a memory card removes any subscription, but they repeat the same two warnings: battery life falls to about a week when the door faces a street, and neither the camera nor the screen is waterproof.
Frequently Asked Questions
Which is better overall: aosu Video Doorbell R1 Ultra or EZVIZ CP4?
The aosu Video Doorbell R1 Ultra, because it brings the better camera, dual-band Wi-Fi and richer detection while still recording locally with no subscription. The EZVIZ CP4 is the right choice only for a door with an existing peephole where you want a screen inside.
What is the biggest difference between the aosu Video Doorbell R1 Ultra and the EZVIZ CP4?
Form factor and camera. The aosu Video Doorbell R1 Ultra is a conventional 5MP doorbell with colour night vision and dual-band Wi-Fi, while the EZVIZ CP4 is a 1080p peephole kit with a 4.3-inch indoor touchscreen that only fits doors with a viewer hole.
Does the aosu Video Doorbell R1 Ultra need a subscription?
No. The included aosuBase Mini has 8 GB of storage with 60-day loop recording, and real-time alerts, two-way audio, human detection and playback all work without a plan. Cloud subscriptions only add advanced AI detections and longer retention.
Does the aosu Video Doorbell R1 Ultra work with Apple HomeKit?
No. It supports Amazon Alexa and Google Assistant only, with no HomeKit, Matter, SmartThings or RTSP support. The EZVIZ CP4 likewise supports Google Home, Alexa and Home Assistant but no HomeKit or Matter.
Does the EZVIZ CP4 need an existing peephole?
Yes. It replaces a standard door viewer, so it only fits a door that already has one, on a leaf between 35 and 105 mm thick. The aosu Video Doorbell R1 Ultra can mount on any door.
Who should buy the aosu Video Doorbell R1 Ultra?
Buyers who want the highest resolution and the richest detection for the money, with local recording and no monthly fee, in a home that runs on Alexa or Google.
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 46 Doorbells side by side
You are looking at two of them. The full table lines up all Doorbells in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 46 Doorbells
- 56 specs compared
- 53 filters
- Doorbells
Peephole Cam 2K
- Doorbells
Battery Doorbell Plus
- Doorbells
Video Doorbell Wired
- Doorbells
Battery Doorbell
- Doorbells
Battery Doorbell Pro
- Doorbells
EP4
- Doorbells
Video Doorbell R1 Ultra
- Doorbells
Video Doorbell S220
- Doorbells
Tapo D225
- Doorbells
Wired Doorbell Pro
- Doorbells
Battery Doorbell 4K Pro
- Doorbells
Nest Doorbell (wired, 3rd Gen)
- Doorbells
CP4
- Doorbells
Tapo D210
- Doorbells
Wired Doorbell Pro (3rd Gen)
- Doorbells
Battery Doorbell 2K+
- Doorbells
Nest Doorbell (wired, 2nd Gen)
- Doorbells
Battery Doorbell (2nd Gen)
- Doorbells
Nest Doorbell (battery)
- Doorbells
Wired Doorbell 2K
