SKU: 26124317181

DAHUA NVR4204-4KS2/L 4 Channel 1U 2HDDs Network Video Recorder

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Description

DAHUA NVR4204-4KS2/L 4 Channel 1U 2HDDs Network Video RecorderNVR4204 4KS2 L 4 Channel 1U 2HDDs Network Video Recorder > New 4. 0 user interface, Security baseline 2. 1 > H. 264, H. 265, Smart H. 264+, and Smart H. 265+. H. 265 auto switch > Max. decoding capability: 8 1080p@30 fps. Supports adaptive decoding > Supports mainstream cameras of ONVIF and RTSP protocols > P2P remote surveillance, video play on mobile device > VGA HDMI simultaneous video output, maximum resolution of HDMI is 4K > AI by Camera: Face

NVR4204-4KS2/L

4 Channel 1U 2HDDs Network Video Recorder

> New 4.0 user interface, Security baseline 2.1

> H.264, H.265, Smart H.264+, and Smart H.265+. H.265 auto switch

> Max. decoding capability: 8 × 1080p@30 fps. Supports adaptive decoding

> Supports mainstream cameras of ONVIF and RTSP protocols

> P2P remote surveillance, video play on mobile device

> VGA/HDMI simultaneous video output, maximum resolution of HDMI is 4K

> AI by Camera: Face detection, perimeter protection, IVS, people counting, heat map, and SMD

> Supports remote configuration and management of IPC, such as set ting parameters, getting information, and upgrading IPC of the same model in batches



Product Data

System

Main Processor

Industrial-grade embedded processor

OS

Embedded Linux

Operation Interface

Web/operating in local GUI

Perimeter Protection by Camera

Performance

4 channels

AI Search

Search for pictures by channel, time and event type

Face Detection by Camera

Performance

4 channels

Face Attributes

6 attributes: Gender, age, glasses, expression, mouth mask, and beard

AI Search

Search for pictures by channel, time and face attributes

SMD Plus by Camera

Performance

4 channels

AI Search

Search by target classification (human, vehicle)

Video

Access Channel

4

Network Bandwidth

Access: 160 Mbps; Storage: 160 Mbps; Forward: 64 Mbps

Resolution

8MP; 6MP; 5MP; 4MP; 3MP; 1080p; 720p; D1

Decoding Capability

4 × 1080p@30 fps

Video Output

1 × VGA output, 1 × HDMI output, supports simultaneous video sources output for VGA and HDMI

Multi-screen Display

1 , 4 views

Third-party Camera Access

ONVIF; RTSP

Compression

Video

Smart H.265/H.265/Smart H.264/H.264/MJPEG

Audio

PCM/G711A/G711U/G726/AAC

Network

Network Protocol

HTTP; HTTPS; TCP/IP; IPv4/IPv6; UPnP; SNMP; RTSP; UDP; SMTP; NTP; DHCP; DNS; IP Filter; DDNS; FTP; Alarm Server; IP Search (Support Dahua IP camera; DVR; NVS; etc.); P2P; auto register

Mobile Phone Access

Android; iOS

Interoperability

ONVIF(profile T/S/G); CGI; SDK

Browser

Chrome; IE9 or later; firefox

Record Playback

Multi-channel Playback

Up to 4 channels for playback

Record Mode

Manual record; alarm recording; SMD recording; smart recording

Storage

Local HDD; network

Backup

USB storage device

Playback Function

1. Play/pause/stop/slow/quick/backward/by frame
2. Full screen, backup (video clip/file), partial zoom in, and audio on/off

Storage

Disk Group

Yes

Alarm

General Alarm

Motion detection, privacy masking, video loss, scene changing, PIR alarm, IPC external alarm

Anomaly Alarm

Camera disconnection, storage error, disk full, IP conflict, MAC conflict, login locked, and cybersecurity exception

Intelligent Alarm

Face detection, perimeter protection (intrusion and tripwire), IVS, people counting, heat map, and SMD alarms

Alarm Linkage

Recording, snapshot, audio, buzzer, log, preset, and email

External Port

Audio Input

1 × RCA input

Audio Output

1 × RCA output

HDD

2 SATA III ports, up to 10 TB for a single HDD. The maximum HDD capacity varies with environment temperature

Alarm Input

4

Alarm Output

2

USB

2(1 × front USB2.0; 1 × back USB2.0)

HDMI

1 (supports up to 4K resolution output)

VGA

1

Network

1 × RJ-45, 10/100/1000 Mbps self-adaptive Ethernet port

General Parameter

Power Supply

DC12 V, 4 A

Power Consumption

< 10 W (HDD not included, idling)

Net Weight

1.51 kg (3.33 lb)

Gross Weight

2.76 kg (6.08 lb)

Product Dimensions

375 mm × 282.4 mm × 53 mm (14.76" × 11.12" × 2.09") (W × L × H)

Package Dimensions

141 mm × 433 mm × 366 mm (5.55" × 17.05" × 14.41") (W × L × H)

Operating Conditions

–10 °C to +55 °C (+10 °F to +131 °F)

Storage Conditions

0 °C to +40 °C (32 °F to 104 °F)

Operating Humidity

10℅~93℅

Storage Humidity

30%~85%

Operating Altitude

3000 m (9842.52 ft)

Installation

Desktop mounted

Certifications

CE: EN62368-1; EN55032,EN55024, EN55035, EN61000-3-2, EN61000-3-3 EN50130-4
FCC: Part 15 Subpart B
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 26124317181

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4.4 ★★★★★
Based on 14 reviews
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Product Reviews
M
Verified Purchase
Mary Afflerbach
Omaha, US
★★★★★ 4
Works well!
Scent Name: Berry, Size: 40 Count (Pack of 1)
Nice flavor. They don’t melt real fast like the ACT I’ve been using. They are smaller than I thought and I didn’t think they would last as long as they do. Keeping my mouth/throat moist as they said. I like the way they stick to your mouth and you don’t have to worry about swolling accidentally!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 27, 2026
C
Verified Purchase
Clubhouse Manager
Draper, US
★★★★★ 5
Berry flavor Xylimelts are the best for dry mouth
Scent Name: Berry, Size: 40 Count (Pack of 1)
Not as strong a flavor as mints. Berry flavor is the best. I take one per night. Does the job.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 27, 2026
A
Verified Purchase
Austin Norton
Massapequa, US
★★★★★ 1
Terrible.
Scent Name: Berry, Size: 40 Count (Pack of 1)
These do not work at all.. I used two at night and they just dissolve and my mouth is still super dry. I tried one during the day just to see and they do not help you salivate at all really. Definitely would recommend trying something else.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
B
Verified Purchase
B. Marshall
Los Angeles, US
★★★★★ 5
Xylimelts
Scent Name: Berry, Size: 40 Count (Pack of 1)
"Xylimelts - I have dry mouth from what I thought was a new medication. I stopped the medication about two weeks ago and it has not improved. I am continuing to use these until I follow up with my doctor. At first I tried these using one disk and it did not seem to work. I tried them again using two and it works a lot better. So, I now use these two disks at a time. If I use them at night, they seem to last about 4 hours. If i use them during the day, they last about 30 minutes. The effects do not last all that long during the day but I do also use Act lemon lozenges. The package says that you can put them on the gums but I put them on the roof of my mouth. I have had no issues getting any of them to stick. Flavors - At my local stores the only flavor is mint. It is way too strong. Using the mint ones would irritate my mouth after a while. Unfortunately, that seems to be the only flavor that most dry mouth products are.....mint. So my quest began to locate products that are not mint. I found these here on Amazon. They come in multiple flavors. Here is my breakdown of the flavors and my thoughts on each. Mild mint (4*) - Better than the regular mint but still mint. It is as described and the mint is not as strong. Slightly Sweet (5*) - Probably my favorite alternative to the mint. They are exactly as described. The have a slightly sweet flavor. It is not overwhelming. Berry (5*) - This was a nice change. It again is a slight berry flavor. Not overpowering or overwhelming. Cinnamon (1*) - This is probably my least favorite. The flavor was ok (it tastes like a very mild fireball) but it didn't seem to lubricate very much and after it was gone it felt like my mouth was drier than before. Orange (4*) - It has a pleasant orange flavor. Sensitive/unflavored - I have not tried this one yet. I probably will not. The reviews of the change in adhesive makes me leary to try it."
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 2, 2025
S
Verified Purchase
Sheila
Boise, US
★★★★★ 3
Mostly works, but..........
I use these at night for sleeping with a CPAP. I am a mouth breather, so my CPAP mask is a full face mask, thus there is constant airflow going into my mouth all night long. While these tablets do help with reducing dry mouth, they only last about 4-5 hrs before they fully dissolve - which does not get me through a full night of sleep. Using two tablets instead of one only gives me roughly one additional hour. If you wear a CPAP mask, you also need to be careful of exactly where you place the tablets, because it will be quite uncomfortable if you mask ends up pressing on the tablet. If the tablet does not adhere well upon initial placement, you pretty much need to fully dry the tablet before re-attempting placement. If the brown side is already wet when you place it against your gums, there is a much higher chance of it just sliding off, instead of sticking. Overall, while not completely eliminating the issue, they do at least reduce the dry mouth problem during sleep.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 21, 2025

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