NVR / Recorders › NVR504-16B-IQ / 32B-IQ
Uniview (UNV)NVR504-B-IQ Series · 4× SATA HDD (RAID)
4-HDD Network Video Recorder · NVR504-B-IQ Series
NVR504-16 / 32B-IQ
16 / 32-channel network video recorder — four SATA bays with RAID 1/5 support for redundant storage, Ultra 265 compression, 4K HDMI output, records cameras up to 16MP, with onboard Face Detection, Vehicle Detection (LPR) and AI smart search.
16MP · max recordingUltra 265 · low storage4× SATA · up to 24 TB eachRAID 1/5 · redundant storageAI Search · face & vehicle detection38 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-IQ 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.
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How many terabytes for your channels and days? Use the storage calculator →
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The Uniview NVR504-B-IQ Series is a 4-HDD network video recorder offered in two sizes: NVR504-16B-IQ (16-ch) and NVR504-32B-IQ (32-ch). Both record cameras up to 16MP with Ultra 265 / H.265 / H.264 compression, support RAID 1 and RAID 5 with Disk Group and Redundant Storage across four independent SATA bays (up to 24 TB each), and include built-in Face Detection, Vehicle Detection (LPR), Temperature Detection and AcuSearch / AcuTrack smart search. HDMI and VGA outputs are independent (VGA is the default; clear it to output the highest HDMI resolution), and the local interface is available in 38 languages including Spanish (Latin America), Portuguese (Brazil) and French.
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.
Uptime-critical storageDisk Group and Redundant Storage with RAID 1 or RAID 5 across the four bays mean a single failed drive doesn't take the recording offline — built for sites where continuous coverage matters.
Growing camera countsBuy channels you don't use yet: the 32B-IQ lets you add cameras later without replacing the recorder.
Remote viewing on phoneP2P protocol built in — the manager checks every site from a phone app without a fixed IP or network skills.
Local-language interface38 GUI languages including Spanish (Latin America), Portuguese (Brazil) and French — your customer operates it in their own language.
Longer video retention per driveUltra 265 roughly halves file size versus H.264 — the same 24 TB disk keeps weeks more footage.
Quick incident lookup across many channelsBuilt-in Face Detection, Vehicle Detection (LPR) and Temperature Detection feed AcuSearch, AcuTrack and Face Snapshot Search — jump straight to the clip you need instead of scrubbing hours of footage across 16 or 32 channels.
Not the right pick if you need…
- PoE ports — cameras need a separate PoE switch (this recorder has no built-in PoE ports)
- A fifth hard disk or more — this series tops out at 4 SATA bays (up to 96 TB total with four 24 TB drives)
- RAID 6 or RAID 10 — the Disk Array Type on this series supports RAID 1 and RAID 5 only
- Simultaneous dual-monitor output — HDMI and VGA are independent on this series (one active at a time; VGA is the default, clear it for full-resolution HDMI)
- Redundant/dual power input — it runs on a single DC 12 V/5 A power supply, no built-in PSU redundancy
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Key Features
Complete list from the official datasheet.
Support Ultra 265/H.265/H.264 video formats
Support 16/32-channel input
Support 1-ch HDMI, 1-ch VGA. HDMI up to 4K (3840x2160) resolution
Support VGA and HDMI independent output
Support up to 16 Megapixels resolution recording
Support ANR technology to enhance the storage reliability when the network is disconnected
Support cloud upgrade
Four bays, RAID protected. AI finds the moment.
Two real capabilities that define this series: RAID-protected multi-bay storage and onboard AI search.
RAID PROTECTED STORAGE
Room to grow, protected against drive failure
Four independent SATA bays each take a disk up to 24 TB — up to 96 TB in one recorder, with Disk Group and Redundant Storage supporting RAID 1 or RAID 5 so a single drive failure doesn't stop recording.
AI SEARCH
Find the moment, not the footage
Built-in Face Detection, Vehicle Detection (LPR) and Temperature Detection on the camera side feed AcuSearch, AcuTrack, Face Snapshot Search and Human Body Search on the recorder — narrow hours of footage down to the exact clip.
Which size fits your project?
Bars show camera capacity per model. Click the model buttons above to switch — the spec table highlights every other difference.
NVR504-16B-IQ16-ch input · Smart Off decoding up to 2×16MP@30 · live view split up to 16
16cameras
NVR504-32B-IQ32-ch input · Smart Off decoding up to 2×16MP@30 · live view split up to 32
32cameras
Who uses it, where it goes and how to size it
Written for the NVR504-16B-IQ / 32B-IQ from the official datasheet: 16 or 32 IP channels, 320 Mbps incoming (160 Mbps with Smart On), recorder-side face, SIP and UMD analysis, 4 SATA bays up to 24 TB each with RAID 1/5, no built-in PoE.
Which size suits which installation
- NVR504-16B-IQ: mixed camera brands that need some AI — The recorder can add UMD to up to 8 ordinary 2 MP cameras, SIP to 4 or face detection to 2, including third-party cameras. With Smart On, 16 cameras still get 10 Mbps each on average.
- NVR504-32B-IQ: campuses with Uniview smart cameras — AcuSearch and AcuTrack run on all channels when the cameras are Uniview SIP/UMD models, so one recorder can trace a person across 32 cameras. Plan about 5 Mbps per camera with Smart On.
- Retail chains and supermarkets — POS input on all channels, up to 16 IP speakers, People Counting Report and Heat Map let one recorder tie receipts, announcements and shopper traffic to the video.
- Logistics yards and sites that must keep evidence — Up to 5 vehicle picture libraries (25,000 pictures) for LPR cameras, 2 million face and 2 million vehicle snapshot records, and RAID 5 across four bays so one failed disk does not lose footage.
Where and how to install the recorder
- 1U in a 19-inch cabinet — The case is 1U, 440 × 344 × 48 mm. Use the RM-1U-440 rack kit, keep the front and rear vents clear, and leave room behind it for the network, alarm and power cables.
- 50 °C for the recorder, 40 °C for big disks — This IQ version is rated -10 °C to 50 °C (the non-IQ NVR504-B goes to 55 °C), and the 24 TB per-disk maximum assumes an ambient temperature of no more than 40 °C. Air-conditioned rooms are best when you run four large disks.
- 12 V / 5 A adapter on a UPS — Power is a DC 12 V / 5 A adapter; the recorder draws no more than 12 W without disks. Put it and the camera PoE switches on a UPS, because an outage during writing can degrade a RAID array and trigger a long rebuild.
- Build the RAID before recording, and turn on array alerts — Fit four identical surveillance disks and create RAID 5 (or RAID 1) first, since building an array erases the disks. Then link the Array Degraded and Array Damaged alerts to e-mail (SMTP) so a failed disk is replaced before a second one fails.
- Cameras on PoE switches, gigabit uplink — There are no PoE ports. Power cameras from PoE switches (100 m maximum per copper run) and connect the switches to one of the 2 gigabit RJ45 ports on the recorder.
- Alarm, audio and POS wiring — Use the 16 alarm inputs and 4 outputs for door contacts, beams and sirens, the RCA audio in/out for one two-way audio channel, and RS485 for a serial PTZ or keyboard. POS terminals and IP speakers connect over the network.
Planning table: channels, bandwidth, disks and retention
Both sizes share the 4-bay IQ platform. Turning Smart On halves the input from 320 to 160 Mbps and lowers decoding, so a 32-camera site with recorder-side AI should average about 5 Mbps per camera. The recorder-side AI limits for ordinary cameras are the same on both sizes; the 32B-IQ adds channels, not more AI channels.
| NVR504-16B-IQ · 16-ch | NVR504-32B-IQ · 32-ch | |
|---|---|---|
| IP camera channels | 16 | 32 |
| Incoming bandwidth (Smart Off / Smart On) | 320 / 160 Mbps | 320 / 160 Mbps |
| Average bitrate per camera with every channel in use (Smart On) | 10 Mbps | 5 Mbps |
| HDD bays × max capacity per disk | 4 × 24 TB | 4 × 24 TB |
| Usable storage: no RAID / RAID 5 / RAID 1 | 96 / 72 / 48 TB | 96 / 72 / 48 TB |
| 4K streams decoded at full resolution (Smart Off / Smart On) | 4 / 2 | 4 / 2 |
| Recorder-side AI on ordinary 2 MP cameras: face / SIP / UMD | 2 / 4 / 8 ch | 2 / 4 / 8 ch |
| Live view split, largest layout | 16 | 32 |
| Local synchronous playback | 16-ch | 16-ch |
| Retention, every channel at 4 Mbps, 96 TB without RAID | 138 days | 69 days |
| Retention, same cameras, 72 TB in RAID 5 | 104 days | 52 days |
- Pick the NVR504-16B-IQ for up to 16 cameras with recorder-side AI: with Smart On each camera can still average 10 Mbps, enough for 4K at a typical 8 Mbps.
- Pick the NVR504-32B-IQ for 17–32 cameras of 2–4 MP, or for 4K cameras if Smart stays off (32 × 8 Mbps = 256 of 320 Mbps).
- If you only need 2 disks and RAID 1, the NVR502-16B-IQ / 32B-IQ has the same AI and decoding in a smaller box; if cameras must plug straight into the recorder, see the NVR504-16B-P16-IQ / 32B-P16-IQ.
Assumptions: 4 Mbps per camera (typical continuous H.265 for 4 MP), 8 Mbps for 4K. Days = TB × 10^12 ÷ (cameras × bitrate ÷ 8 × 86,400), rounded down; RAID 5 on four equal disks keeps three disks of capacity, RAID 1 half. AI channel limits are the datasheet's 2 MP figures; with 4 MP or 4K cameras they are lower.
Full Specifications
Complete official specifications from the manufacturer's datasheet (technical values in English).
Highlighted rows differ between the two models:NVR504-16B-IQ · 16-chNVR504-32B-IQ · 32-ch
Decoding
| Decoding Format | Ultra 265, H.265, H.264 |
| Decoding Capability | 16B-IQ · Smart Off: 2×16MP@30, 2×12MP@30, 4×4K@30, 8×4MP@30, 10×3MP@30, 16×1080P@30 | Smart On: 2×12MP@30, 2×4K@30, 6×4MP@30, 8×3MP@30, 12×1080P@30, 16×720P@3032B-IQ · Smart Off: 2×16MP@30, 2×12MP@30, 4×4K@30, 8×4MP@30, 10×3MP@30, 16×1080P@30, 32×720P@30 | Smart On: 2×12MP@30, 2×4K@30, 6×4MP@30, 8×3MP@30, 12×1080P@30, 24×720P@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, please clear the VGA video on the preview page. |
| Audio Compression | G.711A, G.711U |
Network
| Incoming Bandwidth | Smart Off: 320 Mbps / Smart On: 160 Mbps |
| Outgoing Bandwidth | 160 Mbps |
| Remote Users | 128 |
| Protocols | TCP/IP, P2P, NTP, DHCP, PPPoE, HTTP, HTTPS, DNS, DDNS, SNMP, SMTP, NFS, RTSP, 802.1x, IPv6, IPv4 |
| Browser (Plugin) | IE10, IE11, Chrome 45+, Edge 79+, Firefox 52+ |
Video/Audio Input
| IP Video Input | 16B-IQ · 16-ch32B-IQ · 32-ch |
| RCA Audio Input | 1-ch |
| Peripheral Input — Ip Speaker | 16-ch |
| Peripheral Input — POS | All channels |
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-IQ · 1/4/6/8/9/1632B-IQ · 1/4/6/8/9/16/25/32 |
| Corridor Mode Screen | 16B-IQ · 3/4/5/7/9/10/12/1632B-IQ · 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. 8 MP (3840 × 2160) video resolution, with 1080P 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
| 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 |
| Smart by NVR | Face Detection, Face Comparison, Smart Intrusion Prevention (SIP), Ultra Motion Detection (UMD) |
| Smart by NVR Analyzer Mode | Single Mode (Face Recognition), Single Mode (SIP), Single Mode (UMD), Single Mode (AcuSearch/AcuTrack), Modes cannot active simultaneously, only one mode can active at a time. |
| VCA Search | AcuSearch, AcuTrack, Face Snapshot Search, Face Comparison Search, Motor Vehicle Search, Non-Motor Vehicle Search, Human Body Search, General Search, People Counting Report, Heat Map |
| AcuSearch | All channels with UNV SIP/UMD Camera |
| AcuTrack | All channels with UNV SIP/UMD Camera |
| by NVR | Up to 8-ch with UNV Face Detection Camera, Up to 2-ch with normal camera (UNV and Third-part brand, 2-ch 2MP, 1-ch 4MP) |
| Search by Image | Support |
| Vehicle Picture Library | Up to 5 vehicle picture libraries, with up to 25,000 vehicle pictures in total |
| SIP by NVR with normal cameras | Up to 4-ch with normal camera (UNV and Third-part brand, 4-ch 2MP, 2-ch 4MP, 1-ch 4K) |
| UMD by NVR with normal cameras | Up to 8-ch with normal camera (UNV and Third-part brand, 8-ch 2MP, 4-ch 4MP, 2-ch 4K) |
| Capacity of Snapshot Records | 2 millions records for face snapshot, 2 millions records for vehicle snapshot, 3 millions records for SIP, 2 millions records for video Metadata |
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, Array Damaged, Array Degraded |
GUI Language
| 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 panel: 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 50 °C (14 °F to 122 °F) |
| Working Humidity | ≤ 90% RH (non-condensing) |
| Power Consumption (without HDD) | ≤ 12 W |
Dimensions
| Weight (without HDD) | ≤ 3.4 Kg (7.5 lb) |
| Height | 1U |
| 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 |
Dimensions
Engineering drawing reproduced 1:1 from the official datasheet.
unit: mm (in.)
| Dimensions | 440 mm × 344 mm × 48 mm (17.3" × 13.5" × 1.9") |
| Weight (without HDD) | ≤ 3.4 kg (7.5 lb) |
| Power supply | DC 12 V / 5 A |
| Consumption (without HDD) | ≤ 12 W |
Rear panel — all interfaces
Optional Mounting Accessories
Order together with the camera to save shipping.
RM-1U-4404HDD 1U NVR rack mount
16/32-Channel 4-Bay AI NVR FAQ — NVR504-B-IQ Series
How many IP cameras can I connect?
The NVR504-16B-IQ records 16 IP cameras and the 32B-IQ records 32, up to 16 MP per channel. Incoming bandwidth is 320 (160 with Smart mode on) Mbps, so size camera bitrates to stay inside that figure, and pick the channel count that leaves room to add cameras as the site grows.
What happens if a hard drive fails?
The four SATA bays (up to 24 TB each, 96 TB total) support Disk Group, Redundant Storage and RAID 1 mirroring or RAID 5 parity. A single drive failure then doesn't stop recording or lose the protected footage — worth enabling on sites where video is evidence, such as shops, warehouses and residential compounds.
What AI functions are built into the recorder itself?
The NVR runs Face Detection, Face Comparison, Smart Intrusion Prevention (SIP) and Ultra Motion Detection on board: up to 8 face channels with UNV face-detection cameras or 2 with standard cameras, plus SIP on 4 and UMD on 8 standard channels. AcuSearch, AcuTrack and face/vehicle/human-body search make playback filterable.
Can I find a person from a photo?
Yes — Search by Image is supported: load a face picture and the recorder hunts for matches in its indexed snapshots. It keeps up to 2 million face snapshot records and 2 million vehicle records, so even busy commercial sites stay searchable months later.
Does it have built-in PoE ports?
No — this series has no PoE ports. It connects through two gigabit RJ45 interfaces, and cameras are powered by an external PoE switch on the LAN. That layout suits projects where cameras are spread across floors or buildings rather than home-run to the recorder.
Can I view live video remotely?
Yes — up to 128 remote users can connect. The recorder supports P2P, DDNS, HTTP/HTTPS and RTSP and works in a browser (IE10/11, Chrome 45+, Edge 79+, Firefox 52+), so an integrator can check several client sites from one office. Outgoing bandwidth for remote streams is 160 Mbps.
Does turning on Smart reduce how many cameras the NVR504-32B-IQ can record?
Not the channel count, but the bandwidth: the input drops from 320 Mbps to 160 Mbps. That is 5 Mbps per camera across 32 channels, fine for 2–4 MP cameras on H.265, but only 20 cameras at a typical 4K bitrate of 8 Mbps. If you need all 32 in 4K, either keep Smart off and use camera-side AI, or lower the 4K cameras to about 5 Mbps with Ultra 265.
Which cameras do I need for AcuSearch, AcuTrack and face recognition on the NVR504-16B-IQ?
AcuSearch and AcuTrack work on all channels only with Uniview SIP/UMD cameras, and face analysis reaches 8 channels with Uniview face detection cameras. Ordinary cameras, Uniview or third-party, get much less: face detection on 2 × 2 MP (or 1 × 4 MP), SIP on 4 × 2 MP and UMD on 8 × 2 MP. Third-party cameras are usually added by ONVIF, which the datasheet does not list, so send us the models to confirm.
NVR504-16B-IQ or NVR502-16B-IQ: what do the two extra bays get me?
The AI, bandwidth and decoding are the same; the NVR504 doubles the disks to 4 × 24 TB and adds RAID 5, so protected storage goes from 24 TB (RAID 1 on the NVR502) to 72 TB. With 16 cameras at 4 Mbps that is about 104 days instead of 34. It also doubles the alarm wiring to 16 inputs and 4 outputs. Choose the NVR502 when 2 disks give enough days.
Can I connect two monitors to the NVR504-32B-IQ with different pictures?
Yes: HDMI and VGA support independent output, so for example the guard desk can watch a 16-split on VGA while a 4K screen shows other cameras on HDMI. VGA goes up to 1080p at 60 Hz and HDMI up to 4K at 30 Hz. The two outputs share the decoder, so to get the highest resolution on HDMI the datasheet says to clear the VGA video on the preview page.
Can the NVR504-B-IQ work with license plate lists for gates and parking?
Yes, with an LPR camera: plate reading is done by the camera (Vehicle Detection under Smart by IPC), and the recorder stores up to 5 vehicle picture libraries with 25,000 pictures in total plus 2 million vehicle snapshot records for Motor Vehicle Search. Ordinary cameras do not read plates through the recorder. Barrier or alarm actions depend on the camera and firmware, so tell us the workflow and we will confirm.
Can the NVR504-16B-IQ link cash-register (POS) data and IP speakers to the video?
The datasheet lists POS as a peripheral input on all channels and IP speakers on up to 16 channels, so transaction text can be tied to the cash-desk camera and staff can make announcements or warnings over IP speakers. POS integration depends on the terminal's output format, so send us the POS model before ordering.
Ordering questions — samples, shipping, payment, lead time and genuine stock — are answered once on our FAQ page.
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