UniviewNVR504-B Series · 4× SATA HDD

4-HDD Network Video Recorder · NVR504-B Series

NVR504-16 / 32B

Name: Uniview NVR504-16 / 32B
Brand: Uniview

16 / 32-channel network video recorder — four SATA bays with RAID 1/5, Ultra 265 compression, independent VGA and HDMI output, records cameras up to 16MP, with 320 Mbps incoming bandwidth and 16 alarm-in / 4 alarm-out terminals.

16MP · max recordingUltra 265 · low storage4× SATA · up to 24 TB eachRAID 1/5 · disk redundancy320 Mbps · incoming bandwidth38 languages · local interface

CHOOSE YOUR SIZE — TWO MODELS ON THIS PAGE

Rule of thumb: count your cameras across the whole site, then leave room to grow — 16 channels covers most single buildings; step up to the 32B if you're combining several buildings or expect to add cameras later. Highlighted rows in the spec table below show every difference between the two.

Get Best Price on WhatsApp Need the PDF datasheet? Get it on WhatsApp →

In-stock models: 3 days to your designated warehouse after payment · Out-of-stock or insufficient stock: 7–15 working days

Sample quantities are welcome — testing one or two units first is the normal way to start.

Certified:CEFCCULRoHSWEEEONVIFNDAA

Corporate orders are registered with the manufacturer under your company name — genuine supply you can verify at the source.

16/32Channel options

320 MbpsIncoming bandwidth

4×24 TBSATA bays, max capacity each

4KHDMI output

Is this the right recorder for you?

Plain-language guide for buyers and installers — based only on what this recorder actually does.

Large sites & multi-building campuses16 or 32 channels in one box covers a full warehouse, factory floor, or multi-story retail location without stacking multiple recorders.

Storage that can't afford to failFour SATA bays with RAID 1/5 mirror or parity-protect the footage — a single disk failure doesn't wipe out your recordings.

Long-term evidence retentionFour SATA bays, up to 24 TB each (up to 96 TB total), keep months of footage online instead of overwriting after a few weeks.

High camera counts on one network link320 Mbps incoming bandwidth over dual Gigabit ports handles 32 higher-resolution streams without choking the network.

Wired alarm integration16 alarm inputs and 4 alarm outputs on the rear panel wire directly to sirens, door sensors or access-control triggers — no extra alarm hub needed.

Local-language interface38 GUI languages including Spanish (Latin America), Portuguese (Brazil) and French — your customer operates it in their own language.

Search across many channels fastPaired with Uniview smart cameras, the built-in VCA Search (face snapshot, vehicle, human body, heat map, people counting) jumps straight to the clip instead of scrubbing hours of 16- or 32-channel footage.

Not the right pick if you need…

PoE ports — cameras need a separate PoE switch (this recorder has no built-in PoE ports)
Recorder-side AI on ordinary or third-party cameras — this series has no "Smart by NVR" processing; face/vehicle detection runs on Uniview smart IPC cameras upstream, the recorder only indexes and searches the results
RS232 serial control — only RS485 is present on this series, RS232 is listed N/A
A fifth hard disk or more — this series tops out at 4 SATA bays (up to 96 TB total with four 24 TB drives)
Redundant/dual power input — it runs on a single DC 12 V/5 A power supply, no built-in PSU redundancy

Worried about counterfeits? Order under your own company name.

For corporate buyers: we support submitting the purchase order to Uniview under your company's real name — your company appears on the official order, so the origin of the goods can be verified directly with the manufacturer. Just provide your company name and pay by corporate bank transfer. Models carrying the anti-counterfeit label can also be self-verified on Uniview's official Anti-Counterfeiting Query page — enter the unit's SN plus the scratch-off code.

1 · Company name2 · Corporate bank payment3 · Order registered in your name4 · Verify SN on Uniview's site

Using your own freight forwarder? No problem.

For small and mid-size orders, we deliver directly to your designated forwarder's warehouse in China (EXW / FOB Guangzhou). From hand-over onward, international shipping and destination-side arrangements are handled by your forwarder — the way you already work.

EXW / FOB GuangzhouDelivery to your forwarder's warehouseNo minimum order

Note: manufacturer order registration (left) is available via the corporate purchase channel.

How to get a better price

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RAID-protected storage. Smart search built in.

Two real capabilities that define this series: RAID-protected 4-bay storage and VCA search working with smart cameras.

RAID 1/5 STORAGE

Four bays, and a disk can fail safely

Four independent SATA bays each take a disk up to 24 TB (up to 96 TB total) and support Disk Group plus RAID 1/5 — mirroring or parity protection so a single drive failure doesn't take your recordings with it.

SMART SEARCH

Built-in search, powered by smart cameras

Face Detection, Face Comparison and Vehicle Detection (LPR) on Uniview smart cameras feed the recorder's VCA Search — Face Snapshot Search, Motor/Non-Motor Vehicle Search, Human Body Search, People Counting Report and Heat Map — to narrow hours of 16- or 32-channel footage to the exact clip.

Full Specifications

Complete official specifications from the manufacturer's datasheet (technical values in English).

Highlighted rows differ between the two models:NVR504-16B · 16-chNVR504-32B · 32-ch

Decoding

Decoding Format	Ultra 265, H.265, H.264
Decoding Capability	16B · Ultra 265/H.265: 2×16MP@30, 2×12MP@30, 4×4K@30, 6×5MP@30, 8×4MP@30, 10×3MP@30, 16×1080P@30 \| H.264: 2×16MP(4800×2688)@30, 2×12MP@30, 2×4K@30, 4×5MP@30, 6×4MP@30, 8×3MP@30, 14×1080P@30, 16×720P@3032B · Ultra 265/H.265: 2×16MP@30, 2×12MP@30, 4×4K@30, 6×5MP@30, 8×4MP@30, 10×3MP@30, 16×1080P@30, 32×960P@25 \| H.264: 2×16MP(4800×2688)@30, 2×12MP@30, 2×4K@30, 4×5MP@30, 6×4MP@30, 8×3MP@30, 14×1080P@30, 30×720P@30, 32×D1
Decoding Capability Description	The resolution of each channel cannot exceed 8192 pixels in length and 4096 pixels in width. For VGA/HDMI independent output, the VGA live video is output by default; to output the highest resolution video from the HDMI port, clear the VGA video on the preview page.
Audio Compression	G.711A, G.711U

Network

Incoming Bandwidth	320 Mbps
Outgoing Bandwidth	160 Mbps
Remote Users	128
Protocols	TCP/IP, P2P, UPnP, NTP, DHCP, PPPoE, HTTP, HTTPS, DNS, DDNS, SNMP, SMTP, RTSP, 802.1x, IPv6, IPv4
Browser (Plugin)	IE10, IE11, Chrome 45+, Edge 79+, Firefox 52+

Video/Audio Input

IP Video Input	16B · 16-ch32B · 32-ch
RCA Audio Input	1-ch

Video/Audio Output

HDMI Output	4K (3840 × 2160)/30 Hz, 1920 × 1080/60 Hz, 1920 × 1080/50 Hz, 1600 × 1200/60 Hz, 1280 × 1024/60 Hz, 1280 × 720/60 Hz, 1024 × 768/60 Hz
VGA Output	1920 × 1080/60 Hz, 1920 × 1080/50 Hz, 1600 × 1200/60 Hz, 1280 × 1024/60 Hz, 1280 × 720/60 Hz, 1024 × 768/60 Hz
RCA Audio Output	1-ch
Liveview Display	16B · 1/4/6/8/9/1632B · 1/4/6/8/9/16/25/32
Corridor Mode Screen	16B · 3/4/5/7/9/10/12/1632B · 3/4/5/7/9/10/12/16/32
Two-way Audio	1-ch, RCA (Using the audio input and output)
Snapshot	FTP/Schedule/Event Snapshot; 4-ch snapshot (max. D1 (720 × 576) video resolution, with D1 snapshot resolution)

Recording

Recording Resolution	16 MP/12 MP/8 MP/6 MP/5 MP/4 MP/3 MP/1080P/960P/720P/D1/2CIF/CIF
Synchronous Playback in Local	16-ch

Smart Function

Smart by IPC	All channels (up to 8 images/s in total) Face Detection, Face Comparison, Vehicle Detection (LPR), Temperature Detection, SIP, UMD, Video Metadata, Traffic Monitoring
VCA Search	Face Snapshot Search, Face Comparison Search, Motor Vehicle Search, Non-Motor Vehicle Search, Human Body Search, General Search, People Counting Report, Heat Map

Alarm

General Alarm	Defocus Detection, Scene Change Detection, Object Left Behind, Object Removed, Auto Tracking, Motion Detection, Tampering, Human Body Detection, Video Loss, Alarm Input, Audio Detection
Alert Alarm	IP Conflict, Network Disconnected, Disk Offline, Disk Abnormal, Illegal Access, Hard Disk Space Low, Hard Disk Full, Recording/Snapshot Abnormal

GUI Language

38 languages: Simplified Chinese, Traditional Chinese, English, Vietnamese, Thai, Turkish, Spanish (Latin America), Portuguese (Brazil), Spanish, Portuguese, French, German, Italian, Dutch, Polish, Czech, Hungarian, Slovak, Russian, Hebrew, Arabic, Ukrainian, Estonian, Bulgarian, Greek, Romanian, Danish, Swedish, Norwegian, Finnish, Croatian, Slovenia, Serbia, Korean, Japanese, Latvian, Lithuanian, Persian

Hard Disk

SATA	4 SATA Interfaces
Capacity	Up to 24 TB for each HDD (the maximum HDD capacity varies with environment temperature and hard disk size; the environment temperature for use should not exceed 40°C)
Disk Group	Support
Redundant Storage	Support
Disk Array Type	RAID 1, 5

External Interface

Network Interface	2 RJ45 10 M/100 M/1000 M self-adaptive Ethernet Interface
USB	Front: 1 × USB2.0, Rear panel: 1 × USB2.0, 1 × USB3.0
RS485	1
RS232	N/A
Alarm In	16-ch
Alarm Out	4-ch
Power Supply	DC 12 V/5 A
Power Switch	Support

Working Environment

Working Temperature	-10 °C to 55 °C (14 °F to 131 °F)
Working Humidity	≤ 90% RH (non-condensing)
Power Consumption (without HDD)	≤ 20 W

Dimensions

Weight (without HDD)	≤ 3.4 kg (7.50 lb)
Dimensions	440 mm × 344 mm × 48 mm (17.3" × 13.5" × 1.9")

Certification

Certification	CE; FCC; UL; RoHS; WEEE
CE	EN 55032, EN 61000-3-3, EN IEC 61000-3-2, EN 55035
FCC	Part15 Subpart B

NVR504-16 / 32B

Is this the right recorder for you?

Worried about counterfeits? Order under your own company name.

Using your own freight forwarder? No problem.

Key Features

RAID-protected storage. Smart search built in.

Four bays, and a disk can fail safely

Built-in search, powered by smart cameras

Which size fits your project?

Full Specifications

Decoding

Network

Video/Audio Input

Video/Audio Output

Recording

Smart Function

Alarm

GUI Language

Hard Disk

External Interface

Working Environment

Dimensions

Certification

Dimensions

Optional Mounting Accessories

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