REOLINK CX820 PoE 4K Security Camera

The REOLINK CX820 is a PoE dome security camera listed with 4K video and color night vision. Its Ethernet cable carries power and data, while local microSD and network storage options are described for recording. The listing also claims person, vehicle, and animal detection, plus adjustable warm lights and alerts.

At a glance

The manufacturer describes 4K color night vision using an F1.0 aperture, a 1/1.8-inch image sensor, and HDR.
Smart detection is claimed for people, vehicles, and animals, with customizable spotlight and siren alerts.
Warm lights are described with Auto, Smart, Off, and Timer modes.
The listing describes microSD recording up to 512 GB, as well as NVR HDD and FTP storage options.

Price

$97.49Save 30%

Reference price: ~~$139.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

PoE combines power and data over one Ethernet cable, which can simplify a wired installation where suitable network cabling is available.
Local microSD recording is supported up to 512 GB, with NVR and FTP recording also listed.
The listed detection categories and customizable lights and siren offer options for tailoring motion alerts.

Cons

PoE installation requires a compatible power and network setup, so this is not presented as a wireless camera.

Technical specifications

20 specifications

Identity
Brand	REOLINK
Model	CX820

Video and imaging
Video resolution	4k
Frame rate	25 frames per second
Listed video format	MP4
Photo sensor resolution	8 mp
Sensor technology	CMOS
Viewing angle	93.2 degrees
Night vision range	50 feet

Connectivity and controls
Connection listed	Ethernet
Connectivity technology	Power over Ethernet
Control method	App

Power and storage
Power configuration	Corded Electric
Memory type	Micro SD
Maximum supported microSD capacity	512 GB

Design and installation
Form factor	Dome
Mounting type	Ceiling Mount
Dimensions	7.87 x 5.11 x 4.33 inches
Indoor or outdoor use	Indoor, Outdoor

Protection
Water resistance listed	Waterproof

What to know before buying

Listing details to confirm

The listing’s technical details are not fully consistent: one field gives a 93.2-degree viewing angle, while the specification block separately lists horizontal, vertical, and diagonal angles of 93.2°, 48.2°, and 111.6°. Check which angle measurement applies to the chosen listing. The title and listing describe 4K, while the detailed specification block gives 3840X2160(8MP)@25FPS. A power adapter is explicitly not included.

Who is it for?

A good fit for

Buyers planning a wired PoE camera installation who want color night footage and local or network recording options.
Users who want motion detection for people, vehicles, and animals alongside adjustable light and siren alerts.

Less suited to

Buyers needing a battery-powered or wireless camera.
Installations that require an included power adapter.

REOLINK CX820 PoE 4K Security Camera · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 244 ratings

5 stars81%81%
4 stars8%8%
3 stars3%3%
2 stars3%3%
1 star5%5%

Customer feedback describes strong image quality, especially color and low-light footage, and mentions a wide field of view and use with Scrypted NVR and Frigate. These reports may matter to buyers prioritizing nighttime monitoring, although the listing’s viewing-angle figures are not fully consistent. Aggregate ratings lean positive, but include lower-star ratings too and do not explain individual experiences.

Positive themes

Customer feedback praises image quality, color night vision, and low-light performance.
Some feedback notes a wide field of view and use with Scrypted NVR and Frigate.

Frequently asked questions

Does the CX820 connect over Wi-Fi?

The listing describes Ethernet and Power over Ethernet, not a wireless connection. It is intended for a wired network setup.

What storage options are listed?

The listing describes a microSD card up to 512 GB, NVR hard-drive storage, and FTP storage. The card and other storage equipment are not specified as included.

Is a power adapter included?

No. The listing explicitly says the power adapter is not included.

What night vision and detection features are described?

The manufacturer claims color night vision, warm lights with four operating modes, and detection of people, vehicles, and animals. It also describes customizable spotlight and siren alerts.