NVR / Recorders › NVR501-04B / 08B / 16B
Uniview (UNV)B Series · 1× SATA HDD
1-HDD Network Video Recorder · B Series
NVR501-04 / 08 / 16B
4 / 8 / 16-channel network video recorder — Ultra 265 compression, 4K HDMI output, records cameras up to 16MP, with built-in face detection.
16MP · max recordingUltra 265 · low storage4K HDMI · + VGA simultaneous1× SATA · up to 24 TBFace Detection · built in38 languages · local interface
Choose your size — three models on this page
Rule of thumb: count your cameras, then leave room to grow — a shop with 3 cameras runs happily on the 04B; pick the 08B or 16B if you may add cameras later. Highlighted rows in the spec table below show every difference between the three.
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Lead time · In stock: at your forwarder’s China warehouse 3 days after payment · Not in stock: 7–15 working days · Then air 5–10 days / sea 25–45 days to your port
Terms · Sample orders welcome · Quotation / PI fixes models, prices, Incoterms (EXW or FOB, each quoted separately), lead time and T/T payment · Defective units: free spare units agreed per order (quantity depends on order size) and written into the quotation · Warranty: up to 5 years on Zhongxin Shutong industrial switches, manufacturer warranty on other brands · Full terms, warranty & RMA
How many terabytes for your channels and days? Use the storage calculator →
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The Uniview NVR501-B Series is a 1-HDD network video recorder offered in three sizes: NVR501-04B (4-ch), NVR501-08B (8-ch) and NVR501-16B (16-ch). All three record cameras up to 16MP with Ultra 265 / H.265 / H.264 compression, output simultaneously over 4K HDMI and VGA, and include built-in Face Detection, Intrusion Detection (SIP) and Ultra Motion Detection (UMD). One SATA bay takes a hard disk up to 24 TB; 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.
Small shops & homesThe 4-ch 04B plus four cameras is a complete kit — one disk, one screen, done.
Growing businessesBuy channels you don't use yet: the 08B/16B lets you add cameras later without replacing the recorder.
Remote viewing on phoneP2P protocol built in — the owner checks the shop from a phone app without a fixed IP or network skills.
AI-assisted monitoringBuilt-in Face Detection, Intrusion Detection (SIP) and Ultra Motion Detection (UMD) — 4 channels on the 04B, 8 on the 08B/16B — flag real events instead of hours of empty footage.
Fast backup via USB 3.0The rear panel pairs one USB 3.0 port with one USB 2.0 port — pulling recorded footage onto a drive is faster than on a USB 2.0-only recorder.
Keeps recording through network dropsANR technology lets the camera buffer footage locally and the NVR fills the gap once the network reconnects — fewer blind spots during outages.
Not the right pick if you need…
- PoE ports — cameras need a separate PoE switch (we bundle one at combo price)
- A second hard disk or RAID — this series has a single SATA bay
- Gigabit uplink — the network port is 10/100M (fine for 16 cameras at 80 Mbps total)
- RS485/RS232 serial control for PTZ or other external devices — neither port is present
- Physical alarm in/out wiring for sirens or sensors
Worried about counterfeits? Order under your own company name.
1 · Company name2 · Corporate bank payment3 · Order registered in your name4 · Verify SN on Uniview's site
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EXW / FOBDelivery to your forwarder's warehouseNo minimum order
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Key Features
Complete list from the official datasheet.
Support Ultra 265/H.265/H.264 video formats
4/8/16-channel input
HDMI and VGA simultaneous output
Up to 16 Megapixels resolution recording
ANR technology to enhance the storage reliability when the network is disconnected
Support cloud upgrade
Saves your disk. Spots the real events.
Two real capabilities from the datasheet that matter every day: storage efficiency and built-in smart detection.
ULTRA 265
Half the storage, same image
Ultra 265 compression cuts recording size dramatically versus H.264 — on the same 24 TB disk you keep footage for weeks longer, or record more cameras at higher resolution.
SMART BY IPC
Real alerts, not hours of nothing
Built-in Face Detection, Intrusion Detection (SIP) and Ultra Motion Detection (UMD) run on up to 8 channels (4 on the 04B), feeding Face Snapshot Search, Motor/Non-Motor Vehicle Search, Human Body Search and People Counting Report - search by event, not by scrubbing the timeline.
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.
NVR501-04Blive view split 1/4 · sync playback 4-ch
4cameras
NVR501-08Blive view split 1/4/6/8/9 · sync playback 8-ch
8cameras
NVR501-16Blive view split 1/4/6/8/9/16 · sync playback 16-ch
16cameras
Who uses it, where to install it and how to size it
Written for the NVR501-04B, NVR501-08B and NVR501-16B from the official datasheet: 4, 8 or 16 channels, 80 Mbps incoming bandwidth, 1 SATA bay up to 24 TB, recording up to 16 MP, 10/100 Mbps network port, no built-in PoE.
Who it is for
- Homes and small shops with high-resolution cameras (04B) — Four channels with 80 Mbps of bandwidth leave about 20 Mbps per camera, enough for 4K to 16 MP cameras, and one 24 TB disk keeps about 139 days for four cameras at 4 Mbps.
- Offices, restaurants and clinics (08B) — Eight cameras, each with up to 10 Mbps on average, a 9-screen live view and smart detection from the cameras on all 8 channels (face detection, SIP, UMD).
- Small warehouses and multi-room sites with 2–4 MP cameras (16B) — Sixteen channels on one compact unit, but 80 Mbps means about 5 Mbps per camera with all 16 connected, and smart detection covers 8 of the 16 channels.
- Installers replacing an old recorder — Records Ultra 265, H.265 and H.264 cameras, outputs 4K HDMI and VGA at the same time to existing monitors, and offers a 38-language interface including Spanish (Latin America), Portuguese (Brazil) and French.
Where and how to install
- PoE switch next to the recorder — There are no PoE ports: cameras connect to a PoE switch, and one cable runs from the switch to the recorder's 10/100 M port. All camera video enters through that one port, so connect it directly to the camera switch rather than through the office network. Keep each switch-to-camera copper run under 100 m.
- Desk, shelf or 1U rack — The case is 260 × 222 × 47 mm and under 1 kg without disk. It sits on a desk or shelf; for a 19-inch cabinet order the RM-1U-260 1U rack mount. Keep it in a locked room or cabinet so the disk cannot be taken.
- Keep the disk below 40 °C — The recorder is rated -10 °C to 55 °C, but the datasheet says the environment should not exceed 40 °C with the disk in use. Leave air around it, do not put it on top of the PoE switch or inside a closed box in the sun, and use a ventilated cabinet in hot climates.
- Power and UPS — The recorder uses a DC 12 V / 2 A adapter and draws ≤ 6 W without disk. Put both the recorder and the PoE switch on one small UPS: if only the recorder is protected, the cameras still go dark in a power cut.
- Disk, monitor and backup — Fit one 3.5-inch SATA surveillance-grade drive up to 24 TB before mounting. Connect the monitor by HDMI (up to 4K) and/or VGA, and use the rear USB 3.0 port for fast clip export; the USB 2.0 port takes the mouse.
Planning table: 04B, 08B or 16B
All three share 80 Mbps of incoming bandwidth and one 24 TB bay. More channels means less bitrate and fewer days per camera: the 04B suits a few very high-resolution cameras, the 16B suits many 2–4 MP cameras. With the full 80 Mbps in use, a 24 TB disk fills in about 27.8 days on any of the three.
| NVR501-04B | NVR501-08B | NVR501-16B | |
|---|---|---|---|
| IP channels | 4 | 8 | 16 |
| Incoming bandwidth / average per camera, all channels used | 80 Mbps / 20 Mbps | 80 Mbps / 10 Mbps | 80 Mbps / 5 Mbps |
| HDD bays × max capacity | 1 × 24 TB | 1 × 24 TB | 1 × 24 TB |
| Built-in PoE | — | — | — |
| Decoding, Ultra 265 / H.265 | 2×16MP, 2×12MP, 4×4K | 2×16MP, 2×12MP, 4×4K, 6×5MP, 8×4MP | 2×16MP, 2×12MP, 4×4K, 6×5MP, 8×4MP, 10×3MP, 16×1080P |
| Decoding, H.264 | 2×16MP, 2×12MP, 2×4K, 4×5MP | 2×16MP, 2×12MP, 2×4K, 4×5MP, 6×4MP, 8×3MP | 2×16MP, 2×12MP, 2×4K, 4×5MP, 6×4MP, 8×3MP, 14×1080P, 16×720P |
| Smart by IPC (face detection, SIP, UMD) | 4-ch | 8-ch | 8-ch |
| Max live view split / sync playback | 4 · 4-ch | 9 · 8-ch | 16 · 16-ch |
| Retention on 24 TB, all channels at 4 Mbps (days) | ≈ 139 | ≈ 69 | ≈ 35 |
| Retention on 24 TB, all channels at 8 Mbps (days) | ≈ 69 | ≈ 35 | — (128 Mbps > 80 Mbps) |
- Pick the 04B for up to 4 cameras of 4K to 16 MP: at 8 Mbps each, 24 TB keeps about 69 days.
- Pick the 08B for 5 to 8 cameras, or when every camera needs smart detection: all 8 channels get it.
- Pick the 16B for 9 to 16 cameras of 2–4 MP; for 30 days on 24 TB keep the average below about 4.6 Mbps per camera.
Retention = disk TB × 10^12 ÷ (cameras × bitrate ÷ 8 × 86400 s), continuous recording, no reserve. 4 Mbps is an assumed average for a 4 MP H.265 camera, 8 Mbps for a 4K camera. Decoding figures are @30 fps from the official NVR501-B datasheet.
Full Specifications
Complete official specifications from the manufacturer's datasheet (technical values in English).
Highlighted rows differ between the three models:NVR501-04B · 4-chNVR501-08B · 8-chNVR501-16B · 16-ch
Decoding
| Decoding Format | Ultra 265, H.265, H.264 |
| Decoding Capability | 04B · Ultra 265/H.265: 2×16MP@30, 2×12MP@30, 4×4K@30 | H.264: 2×16MP(4800×2688)@30, 2×12MP@30, 2×4K@30, 4×5MP@3008B · Ultra 265/H.265: 2×16MP@30, 2×12MP@30, 4×4K@30, 6×5MP@30, 8×4MP@30 | H.264: 2×16MP(4800×2688)@30, 2×12MP@30, 2×4K@30, 4×5MP@30, 6×4MP@30, 8×3MP@3016B · 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@30 |
| Decoding Capability Description | The resolution of each channel cannot exceed 8192 pixels in length and 4096 pixels in width |
| Audio Compression | G.711A, G.711U |
Network
| Incoming Bandwidth | 80 Mbps |
| Outgoing Bandwidth | 64 Mbps |
| Remote Users | 128 |
| Protocols | TCP/IP, P2P, UPnP, NTP, DHCP, PPPoE, HTTP, HTTPS, DNS, DDNS, SNMP, SMTP, RTSP, IPv6, IPv4 |
| Browser (Plugin) | IE10, IE11, Chrome 45+, Edge 79+, Firefox 52+ |
Video/Audio Input
| IP Video Input | 04B · 4-ch08B · 8-ch16B · 16-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 | 04B · 1/408B · 1/4/6/8/916B · 1/4/6/8/9/16 |
| Corridor Mode Screen | 04B · 3/408B · 3/4/5/7/916B · 3/4/5/7/9/10/12/16 |
| 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 | 04B · 4-ch08B · 8-ch16B · 16-ch |
Smart
| Smart by IPC | 04B · Total 4-ch (Face Detection, SIP, UMD)08B · Total 8-ch (Face Detection, SIP, UMD)16B · Total 8-ch (Face Detection, SIP, UMD) |
| VCA Search | Face Snapshot Search, Motor Vehicle Search, Non-Motor Vehicle Search, Human Body Search, General Search, People Counting Report |
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
| 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 | 1 SATA Interface |
| 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) |
External Interface
| Network Interface | 1 RJ45 10 M/100 M self-adaptive Ethernet Interface |
| USB | Rear panel: 1 × USB 2.0, 1 × USB 3.0 |
| RS485 | N/A |
| RS232 | N/A |
| Alarm In | N/A |
| Alarm Out | N/A |
| Power Supply | DC 12 V / 2 A |
Working Environment
| Working Temperature | -10 °C to 55 °C (14 °F to 131 °F) |
| Working Humidity | ≤ 90% RH (non-condensing) |
| Power Consumption (without HDD) | ≤ 6 W |
Dimensions
| Weight (without HDD) | ≤ 0.98 kg (2.16 lb) |
| Dimensions | 260 mm × 222 mm × 47 mm (10.2" × 8.7" × 1.8") |
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 | 260 × 222 × 47 mm (10.2" × 8.7" × 1.8") |
| Weight (without HDD) | ≤ 0.98 kg (2.16 lb) |
| Power supply | DC 12 V / 2 A |
| Consumption (without HDD) | ≤ 6 W |
Rear panel — all interfaces
Optional Mounting Accessories
Order together with the camera to save shipping.
RM-1U-2601-HDD 1U NVR rack mount tray
4/8/16-Channel NVR FAQ — NVR501-B Series
How many IP cameras can I connect?
The NVR501-04B takes 4 IP cameras, the 08B 8 and the 16B 16, recording up to 16 MP per channel. Incoming bandwidth is 80 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.
How many hard drives fit and what is the maximum capacity?
One SATA bay, taking a surveillance hard drive up to 24 TB. Use surveillance-rated hard drives; real retention depends on camera count, resolution and bitrate, and Ultra 265 keeps files smaller than H.264 at the same image quality, stretching every terabyte further.
How much storage does Ultra 265 save compared with H.264?
Roughly half the storage for the same image: Ultra 265 cuts recording size dramatically versus H.264, so the same 24 TB disk keeps footage for weeks longer — or records more cameras at higher resolution. H.265 and H.264 are also supported for mixed camera fleets.
Does it support face detection and smart search?
Yes, via UNV smart cameras: Face Detection, SIP rules and Ultra Motion Detection on up to 4 channels on the 04B, or 8 channels on the 08B and 16B. The NVR indexes these events for VCA Search — face, vehicle, human-body and people-counting search — so you jump straight to the right clip instead of scrubbing hours of video.
Does it have built-in PoE ports?
No — this series has no PoE ports. It connects through one 10/100 Mbps RJ45 interface, 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 64 Mbps.
The NVR501-16B has only a 10/100 Mbps network port. Is that a bottleneck for 16 cameras?
It sets the practical ceiling, which is why the incoming bandwidth is 80 Mbps: all camera video and all remote viewing pass through this one port. With 16 cameras that means about 5 Mbps per camera on average, which suits 2 MP to 4 MP cameras in H.265 or Ultra 265. Connect the port straight to the camera PoE switch, and set each camera's bitrate before adding it so the total stays under 80 Mbps. For many 4K cameras on one recorder, choose a model with gigabit ports and more bandwidth, such as the NVR302-16B-IQ (160 Mbps).
How many 4K or 16 MP cameras can the NVR501-08B record and show?
Recording is limited by the 80 Mbps bandwidth: eight 4K cameras at 8 Mbps each use 64 Mbps and fit, while 16 MP cameras usually need a higher bitrate, so fewer of them fit. For display, the recorder decodes 2 × 16 MP, 2 × 12 MP or 4 × 4K streams at 30 fps in Ultra 265 / H.265, so a 9-screen live view of eight 4K cameras uses the cameras' sub-streams. With eight 4K cameras at 8 Mbps, the 24 TB disk keeps about 35 days.
Can all 16 cameras on the NVR501-16B use intrusion and line-crossing alarms?
No, at most 8 of them. The datasheet lists Smart by IPC as a total of 8 channels on the 16B (4 on the 04B, 8 on the 08B), covering Face Detection, SIP (intrusion, line crossing) and Ultra Motion Detection, and the analysis runs in the cameras, so they must support these functions. Give the 8 smart channels to entrances, perimeter and cash areas, and use ordinary motion detection on the rest.
My existing cameras are H.264 only. Will they work on the NVR501-16B?
H.264 is a supported format, so recording works, but H.264 uses more bitrate and more disk for the same picture, and decoding is lower: 14 × 1080P instead of 16 × 1080P, and 2 × 4K instead of 4 × 4K. In practice, keep the 16-screen view on sub-streams, watch the 80 Mbps total, and switch any camera that offers H.265 to it.
Can I add Hikvision, Dahua or other third-party cameras to the NVR501-08B?
ONVIF is not named in the protocol list of the official NVR501-B datasheet (it lists TCP/IP, P2P, UPnP, NTP, DHCP, PPPoE, HTTP, HTTPS, DNS, DDNS, SNMP, SMTP, RTSP, IPv6 and IPv4). Uniview cameras are the safe choice, and the Smart by IPC functions depend on the camera supporting them. If you plan to reuse other brands, send us the camera models before ordering and we will confirm whether they can be added and what will work.
Ordering questions — samples, shipping, payment, lead time and genuine stock — are answered once on our FAQ page.
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