NVR / Recorders › NVR501-04B-LP4 / 08B-LP8
Uniview (UNV)NVR501-B-LP Series · 1× SATA HDD
1-HDD PoE Network Video Recorder · B-LP Series
NVR501-04B-LP4 / 08B-LP8
4 / 8-channel PoE network video recorder — built-in 4/8-port PoE switch, Ultra 265 compression, 4K HDMI output, records cameras up to 16MP, with onboard Face Detection and VCA search.
16MP · max recordingUltra 265 · low storage4/8× PoE · built-in ports1× SATA · up to 24 TB4K HDMI · + VGA simultaneous38 languages · local interface
Choose your size — two models on this page
Rule of thumb: count your PoE cameras, then leave room to grow — a shop with 3 cameras plugs straight into the 04B-LP4; pick the 08B-LP8 if you may add cameras later. Highlighted rows in the spec table below show every difference between the two.
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The Uniview NVR501-B-LP Series is a 1-HDD PoE network video recorder offered in two sizes: NVR501-04B-LP4 (4-ch, 4-port PoE) and NVR501-08B-LP8 (8-ch, 8-port PoE). Both 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) feeding VCA search. 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 with PoE camerasBuilt-in 4/8-port PoE switch — plug cameras straight into the recorder, no separate PoE switch or extra cabling to buy.
Growing businessesBuy channels you don't use yet: the 08B-LP8 lets you add PoE 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.
Local-language interface38 GUI languages including Spanish (Latin America), Portuguese (Brazil) and French — your customer operates it in their own language.
Longer video retentionUltra 265 roughly halves file size versus H.264 — the same 24 TB disk keeps weeks more footage.
AI-assisted monitoringBuilt-in Face Detection, Intrusion Detection (SIP) and Ultra Motion Detection (UMD) — 4 channels on the 04B-LP4, 8 on the 08B-LP8 — flag real events instead of hours of empty footage.
Not the right pick if you need…
- Gigabit network uplink — the built-in network port is 10/100M (matched to this series' 80 Mbps bandwidth)
- A second hard disk or RAID — this series has a single SATA bay
- Serial PTZ control from the NVR itself — RS485 and RS232 are both listed N/A on this series
- Physical alarm input/output terminals — Alarm In and Alarm Out are both N/A on the rear panel
- Extra PoE budget for high-draw cameras — each port is capped at 30 W (standard PoE/PoE+, not PoE++ 60W+ devices)
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Key Features
Complete list from the official datasheet.
Support Ultra265/H.265/H.264 video formats
4/8-channel input
Plug & Play with 4/8 independent PoE network interfaces
Support 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
Cameras plug in. The recorder watches for you.
Two real capabilities that define this series: built-in PoE and onboard Smart by IPC detection.
PLUG & PLAY POE
No separate PoE switch to buy
Each RJ45 port is independent PoE — up to 30 W per port, 50 W total on the 04B-LP4 or 75 W total on the 08B-LP8 (IEEE 802.3at/af) — plug cameras straight into the recorder.
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-LP4), feeding Face Snapshot Search, Motor/Non-Motor Vehicle Search, Human Body Search, General Search, People Counting Report and Heat Map — 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.
NVR501-04B-LP44-ch input · 4-port PoE, 50 W total · live view split 1/4
4cameras
NVR501-08B-LP88-ch input · 8-port PoE, 75 W total · live view split 1/4/6/8/9
8cameras
Who uses it, where it goes and how to install it
Written for the NVR501-04B-LP4 and NVR501-08B-LP8 from the official datasheet: 4 or 8 channels with the same number of built-in PoE ports (50 W or 75 W total), 80 Mbps incoming, 1 SATA bay up to 24 TB, 4K HDMI + VGA, compact 205 × 212 × 46 mm case.
Which size suits which installation
- NVR501-04B-LP4: shops, kiosks and homes with up to 4 cameras — 4 channels and 4 PoE ports with 50 W in total — enough for four ordinary fixed PoE cameras. It is a hard limit: a fifth camera cannot be added, even through an external switch.
- NVR501-08B-LP8: small businesses with 5–8 cameras or planned growth — 8 channels, 8 PoE ports and 75 W, plus 6/8/9-window live view that the 04B-LP4 does not have. A shop that starts with 4 cameras can add 4 more later without replacing the recorder.
- Installers doing quick small jobs — One compact box (205 × 212 × 46 mm, under 1 kg) replaces a recorder plus a PoE switch, the cameras are plug-and-play on the PoE ports, and the menu comes in 38 languages for handover to the customer.
- Owners who want to find events quickly — With cameras that run Face Detection, SIP (intrusion) or UMD themselves (Smart by IPC, 4 or 8 channels), the recorder offers face snapshot, human body and vehicle search, people counting and heat map instead of scrolling the timeline.
Where and how to install the recorder
- Cool, ventilated indoor spot — Put it on a desk, shelf or in a small ventilated wall cabinet, never in a ceiling void or closed metal box. The unit works from -10 °C to 55 °C, but the datasheet allows the largest disks only if the room stays at or below 35 °C — in hot climates use an air-conditioned office.
- Original adapter and a UPS — The cameras' PoE power comes through the recorder's adapter (DC 48 V / 1.35 A on the 04B-LP4, DC 52 V / 1.8 A on the 08B-LP8), so do not swap it for a lower-rated one. Put the NVR and the router on a UPS: during a power cut the recorder keeps the PoE cameras running and recording.
- Surveillance-grade hard disk — Fit one SATA surveillance-grade drive (designed for 24/7 writing) before powering up, then format it in the NVR menu. Size it with the retention rows in the table below; desktop drives are not built for continuous recording.
- PoE cabling: 100 m per port, protected outdoors — Run one Cat5e or Cat6 copper cable from each PoE port to each camera, at most 100 m per run (the PoE ports are 10/100M). Use outdoor-rated cable outside, put joints in a junction box and add surge protection on long outdoor runs. Label each cable with its port number.
- Network port, monitor and remote access — Connect the single 10/100M LAN port to the router for P2P remote viewing; it carries up to 64 Mbps outgoing to phones and PCs. HDMI (up to 4K) and VGA work at the same time, so one monitor can sit at the cash desk and one in the office.
Planning table: channels, PoE, bandwidth, disk and retention
Both sizes share the same 80 Mbps input, single disk bay and 30 W per-port limit. The 08B-LP8 doubles the channels and adds 25 W of PoE budget, but each camera gets half the bandwidth and the same disk lasts half as long.
| NVR501-04B-LP4 | NVR501-08B-LP8 | |
|---|---|---|
| IP channels / built-in PoE ports | 4 / 4 | 8 / 8 |
| PoE budget | 50 W total, max 30 W per port | 75 W total, max 30 W per port |
| Incoming bandwidth (shared evenly) | 80 Mbps (20 Mbps per camera) | 80 Mbps (10 Mbps per camera) |
| Hard disk | 1 × SATA, up to 24 TB | 1 × SATA, up to 24 TB |
| Full-quality decoding (H.265) | 4 × 4K@30 | 4 × 4K@30, 6 × 5MP@30, 8 × 4MP@30 |
| Live view layouts | 1/4 | 1/4/6/8/9 |
| Days on a 4 TB disk, every channel at 4 Mbps | ≈23 days | ≈11.6 days |
| Days on a 24 TB disk, every channel at 4 Mbps | ≈139 days | ≈69 days |
| Power adapter | DC 48 V / 1.35 A | DC 52 V / 1.8 A |
- Pick the NVR501-04B-LP4 only if the site will never need more than 4 cameras: 4 channels is the ceiling, and at 4 Mbps each a 4 TB disk keeps about 23 days.
- Pick the NVR501-08B-LP8 for 5–8 cameras or for growth; with all 8 recording, choose at least 8 TB if the customer wants about 3 weeks of footage (8 TB ≈ 23 days at 4 Mbps each).
- Need more than 75 W of PoE, a second disk or a gigabit uplink? This series is the wrong size — look at the 2-bay NVR502-08B-P8 / 16B-P16 instead.
Retention = disk TB × 10^12 ÷ (cameras × bitrate ÷ 8 × 86400 s). 4 Mbps is our assumed average for a 4 MP camera on H.265 recording 24 h a day; real bitrates depend on the scene and settings. The 24 TB maximum applies only at room temperatures up to 35 °C (datasheet).
Full Specifications
Complete official specifications from the manufacturer's datasheet (technical values in English).
Highlighted rows differ between the two models:NVR501-04B-LP4 · 4-chNVR501-08B-LP8 · 8-ch
Decoding
| Decoding Format | Ultra 265, H.265, H.264 |
| Decoding Capability | 04B-LP4 · 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-LP8 · 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@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-LP4 · 4-ch08B-LP8 · 8-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-LP4 · 1/408B-LP8 · 1/4/6/8/9 |
| Corridor Mode Screen | 04B-LP4 · 3/408B-LP8 · 3/4/5/7/9 |
| 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-LP4 · 4-ch08B-LP8 · 8-ch |
Smart
| Smart by IPC | 04B-LP4 · Total 4-ch (Face Detection, SIP, UMD)08B-LP8 · 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, 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
| 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 35°C) |
External Interface
| Network Interface | 1 RJ45 10 M/100 M self-adaptive Ethernet Interface |
| USB | Rear panel: 1 × USB2.0, 1 × USB3.0 |
| RS485 | N/A |
| RS232 | N/A |
| Alarm In | N/A |
| Alarm Out | N/A |
| Power Supply | 04B-LP4 · DC 48 V / 1.35 A08B-LP8 · DC 52 V / 1.8 A |
PoE
| PoE Interface | 04B-LP4 · 4 RJ45 10 M/100 M self-adaptive Ethernet Interface08B-LP8 · 8 RJ45 10 M/100 M self-adaptive Ethernet Interface |
| Max Power | 04B-LP4 · Max 30 W for single port, Max 50 W in total08B-LP8 · Max 30 W for single port, Max 75 W in total |
| Supported Standard | IEEE 802.3at, IEEE 802.3af |
Working Environment
| Working Temperature | -10 °C to 55 °C (14 °F to 131 °F) |
| Working Humidity | ≤ 90% RH (non-condensing) |
| Power Consumption (without HDD) | ≤ 10 W |
Dimensions
| Weight (without HDD) | 04B-LP4 · ≤ 0.8 Kg (1.76 lb)08B-LP8 · ≤ 0.9 Kg (1.98 lb) |
| Dimensions | 205 mm × 212 mm × 46 mm (8.1" × 8.3" × 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 | 205 mm × 212 mm × 46 mm (8.1" × 8.3" × 1.8") |
| Power Consumption (without HDD) | ≤ 10 W |
| PoE Standard | IEEE 802.3at, IEEE 802.3af |
Rear panel — all interfaces
4/8-Channel PoE NVR FAQ — NVR501-B-LP Series
How many cameras can the NVR501-08B-LP8 power directly?
The NVR501-08B-LP8 records 8 IP cameras through 8 built-in PoE ports (75 W total); the NVR501-04B-LP4 handles 4 cameras with 4 ports (50 W total). Each PoE port delivers up to 30 W (IEEE 802.3at/af), so typical 4–12 W IP cameras plug straight into the recorder — power and video over one cable, no separate PoE switch needed.
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.
What is the maximum camera resolution it records?
It records IP cameras up to 16 MP, decodes Ultra 265, H.265 and H.264, and drives a monitor at 4K (3840×2160) over HDMI with VGA up to 1080p. Incoming bandwidth is 80 Mbps across all channels.
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-LP4, or 8 channels on the 08B-LP8. 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.
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.
Will it run reliably in hot climates?
The rated working range is -10 °C to 55 °C at up to 90% non-condensing humidity, and the unit draws ≤ 10 W without drives. Give it ventilation and keep it out of direct sun inside equipment cabinets — standard practice for tropical installs.
Can I connect third-party (ONVIF) cameras to the NVR501-04B-LP4 / 08B-LP8?
The official datasheet's protocol list does not include ONVIF (it lists RTSP among others), so confirm your camera models with us before ordering. Uniview's own procedure for other brands is: set the channel from plug-and-play to manual, choose the ONVIF protocol, enter the camera's IP, user name, password and port. Smart search (face, body, vehicle) only works with cameras that send those events themselves, so a basic third-party camera will usually just record video.
How many 4K (8 MP) cameras can the NVR501-08B-LP8 handle?
It can record 8 of them: recording goes up to 16 MP per channel, and 80 Mbps shared by 8 cameras leaves 10 Mbps each, enough for 4K on H.265 at normal settings. Full-quality decoding is listed as 4 × 4K@30, so playing back or viewing more than 4 4K main streams at once is beyond it; multi-window live view normally uses the cameras' sub-streams. The 04B-LP4 handles 4 4K cameras with the same 4 × 4K@30 decoding.
Can I add cameras through an external switch beyond the built-in PoE ports?
Only up to the channel count: the NVR501-04B-LP4 records 4 cameras and the NVR501-08B-LP8 records 8, whether they sit on the PoE ports or on the LAN side. A switch helps when a camera is more than 100 m away or a port is needed elsewhere, but it does not raise the limit. Cameras on the LAN share the single 10/100M network port with remote viewing.
What is the difference between the NVR501-04B-LP4 and the NVR501-04B-P4?
Recording, decoding, 80 Mbps bandwidth and the PoE budget (50 W on the 4-channel, 75 W on the 8-channel) are the same on both datasheets. The LP case is smaller (205 × 212 × 46 mm, ≤ 0.8 kg) than the P case (260 × 222 × 47 mm, ≤ 1.1 kg). The P version allows the largest disks up to 40 °C room temperature instead of 35 °C and has an optional 1U rack mount (RM-1U-260), so it suits hot rooms and 19-inch racks better.
What happens to the recording if the cable between a camera and the NVR501-B-LP is cut for a while?
The recorder supports ANR: a camera that also supports ANR and has its own microSD card keeps recording during the outage, and the NVR copies the missing part back when the link returns. On a PoE port, a cut cable also cuts the camera's power, so ANR mainly helps with network drops between a switch-connected camera and the NVR. The NVR raises a Video Loss / Network Disconnected alarm either way.
Can I connect alarm sensors, a siren or a PTZ keyboard to the NVR501-04B-LP4 / 08B-LP8?
Not on the recorder itself: Alarm In, Alarm Out, RS485 and RS232 are all N/A on this series. Wire sensors or a siren to a camera that has its own alarm terminals, and control network PTZ cameras over the network from the NVR menu or phone. If the project needs alarm terminals on the recorder, choose a larger series and ask us which one.
Ordering questions — samples, shipping, payment, lead time and genuine stock — are answered once on our FAQ page.
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