NVR / Recorders › NVR301-04S3-P4 / 08S3-P8
Uniview (UNV)S3-P Series · 1× SATA HDD · Built-in PoE
1-HDD PoE Network Video Recorder · S3-P Series
NVR301-04S3-P4 / 08S3-P8
4 / 8-channel network video recorder with built-in PoE ports — Ultra 265 compression, 4K HDMI output, records cameras up to 8MP, no separate PoE switch needed.
8MP · max recordingUltra 265 · low storage4K HDMI · + VGA simultaneousBuilt-in PoE · 4 / 8 ports by model1× SATA · up to 10 TB21 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 runs happily on the 04S3-P4; pick the 08S3-P8 if you may add cameras later or need more total PoE power budget (54 W vs 75 W). Highlighted rows in the spec table below show every difference between the two.
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The Uniview NVR301-S3-P Series is a 1-HDD PoE network video recorder offered in two sizes: NVR301-04S3-P4 (4-ch, 4 built-in PoE ports) and NVR301-08S3-P8 (8-ch, 8 built-in PoE ports). Both record cameras up to 8MP with Ultra 265 / H.265 / H.264 compression and output simultaneously over 4K HDMI and VGA. One SATA bay takes a hard disk up to 10 TB; the local interface is available in 21 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 04S3-P4 plus four PoE cameras is a complete kit — no separate PoE switch, no extra power bricks at each camera, one disk, done.
Growing businessesBuy channels you don't use yet: the 08S3-P8 lets you add PoE cameras later without replacing the recorder or buying a bigger switch.
One-cable installsEach PoE port carries power and video over a single Ethernet cable — no electrical outlet needed at the camera position.
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 interface21 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 10 TB disk keeps weeks more footage.
Not the right pick if you need…
- A second hard disk or RAID — this series has a single SATA bay
- Gigabit uplink — the network port is 10/100M
- Alarm in/out wiring for sirens or sensors — this series has no physical alarm terminals
- Audio input — it has an RCA audio output only (camera-side mics still record)
- High-power PoE devices beyond budget — each port is capped at 30 W, and total PoE budget is 54 W (04S3-P4) or 75 W (08S3-P8)
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Key Features
Complete list from the official datasheet.
Support Ultra 265 / H.265 / H.264 video formats
4 / 8-channel input (by model)
Plug & Play with 4 / 8 independent PoE network interfaces (by model)
Support 1-ch HDMI, 1-ch VGA, HDMI up to 4K (3840×2160) resolution
HDMI and VGA simultaneous output
Up to 4K resolution recording
Support cloud upgrade
Saves your disk. Catches what matters.
Two real capabilities from the datasheet that matter every day: storage efficiency and smart detection.
ULTRA 265
Half the storage, same image
Ultra 265 compression cuts recording size dramatically versus H.264 — on the same 10 TB disk you keep footage for weeks longer, or record more cameras at higher resolution.
SMART DETECTION
Catches intrusions, not just motion
Built-in Face Detection plus SIP smart rules (Intrusion Detection, Cross Line Detection, Enter/Leave Area) and Ultra Motion Detection on up to 4 channels — backed by Face Snapshot Search and Behavior Search to jump straight to the right 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.
NVR301-04S3-P4live view split 1/4 · sync playback 4-ch · 4 PoE ports
4cameras
NVR301-08S3-P8live view split up to 9 · sync playback 8-ch · 8 PoE ports
8cameras
Who uses it, where to install it and how to size it
Written for the NVR301-04S3-P4 and NVR301-08S3-P8 from the official datasheet: 4 or 8 channels with 4 or 8 built-in PoE ports, 64 Mbps incoming bandwidth, 1 SATA bay up to 10 TB, 4K HDMI plus VGA.
Who it is for
- Small shops, offices and homes (04S3-P4) — Up to 4 cameras, each on one PoE cable from the recorder: no separate PoE switch and no power adapter at the camera. The 54 W PoE budget covers four typical IR cameras with room to spare.
- Restaurants, clinics and small warehouses (08S3-P8) — 8 channels and 8 PoE ports with a 75 W budget, live view split up to 9 screens and 8-channel synchronous playback, so one monitor shows the whole site.
- Installers building ready-made kits — One box does recording, PoE and display (4K HDMI and VGA at the same time), with a 21-language interface including Spanish (Latin America), Portuguese (Brazil) and French for handover to the end user.
- Not for: larger or alarm-wired sites — There is one SATA bay (no second disk or RAID), a 10/100 Mbps network port, and no alarm in/out or audio input terminals. For more channels look at the 2-disk NVR302 or NVR502 series.
Where and how to install
- Place it where the cables meet — Put the NVR near the centre of the camera layout so every PoE run stays under 100 m of Cat5e/Cat6 copper. Longer runs need a PoE extender or a switch closer to the camera.
- Desk, shelf or 19-inch rack — The case is 260 × 240 × 46 mm and weighs about 1.1 kg without disk. It sits on a desk or shelf; for a cabinet order the RM-1U-260 1U rack mount. Keep it in a locked room or cabinet so the recorder and disk cannot be taken away.
- Heat and ventilation — Working range is -10 °C to 55 °C and ≤ 90% RH non-condensing. Leave space around the case, do not stack other hot equipment on it, and avoid closed boxes in direct sun: the datasheet notes that maximum disk capacity depends on ambient temperature.
- Power and UPS — The external adapter is DC 48 V / 1.35 A (04S3-P4) or DC 52 V / 1.8 A (08S3-P8), and it also feeds every PoE camera. Put the adapter on a small UPS: a power cut then does not stop recording or reboot all cameras, and the disk is protected from sudden shutdowns.
- Disk and outdoor cable runs — Fit one 3.5-inch SATA surveillance-grade drive (rated for 24/7 writing) up to 10 TB before you mount the unit. For cameras on poles or outside walls, add surge protection on the Ethernet line and earth it, so a lightning surge does not travel back into the PoE ports.
Planning table: 04S3-P4 or 08S3-P8
Both models share the same 64 Mbps incoming bandwidth, the same single 10 TB bay and the same 30 W per-port PoE limit. The 08S3-P8 doubles the channels and PoE ports and raises the PoE budget from 54 W to 75 W, so with 8 cameras the same disk holds half as many days.
| NVR301-04S3-P4 | NVR301-08S3-P8 | |
|---|---|---|
| IP channels / built-in PoE ports | 4 / 4 | 8 / 8 |
| Incoming bandwidth (all cameras together) | 64 Mbps | 64 Mbps |
| HDD bays × max capacity | 1 × 10 TB | 1 × 10 TB |
| PoE budget / per-port max | 54 W / 30 W | 75 W / 30 W |
| PoE load with every port on a 6 W IR camera (used / total) | 24 W / 54 W | 48 W / 75 W |
| Decoding (live view / playback) | 1×4K@30 / 4×5MP@25 | 1×4K@30, 4×5MP@25, 6×1080P@30, 8×720P@30 |
| Live view split / sync playback | 1/4 · 4-ch | 1/4/6/8/9 · 8-ch |
| Retention on 10 TB, all channels at 4 Mbps (days) | ≈ 57.9 | ≈ 28.9 |
| Retention on 10 TB, all channels at 8 Mbps (days) | ≈ 28.9 | ≈ 14.5 |
- Pick the 04S3-P4 when the site will never need more than 4 cameras: four cameras at 4 Mbps keep about 57.9 days on a 10 TB disk.
- Pick the 08S3-P8 if you have 5 to 8 cameras, may add cameras later, or need more PoE power (75 W instead of 54 W).
- Need 30 days with 8 cameras on one 10 TB disk? Keep the average near 4 Mbps per camera (Ultra 265 or H.265, or event recording on quiet cameras).
Retention = disk TB × 10^12 ÷ (cameras × bitrate ÷ 8 × 86400 s), continuous recording, no overwrite reserve. 4 Mbps is an assumed average for a 4 MP camera in H.265; 8 Mbps fills the 64 Mbps bandwidth with 8 cameras. 6 W per camera is an assumed typical IR camera draw. All other values are from the official datasheet.
Full Specifications
Complete official specifications from the manufacturer's datasheet (technical values in English).
Highlighted rows differ between the three models:NVR301-04S3-P4 · 4-chNVR301-08S3-P8 · 8-ch
Decoding
| Decoding Format | Ultra 265, H.265, H.264 |
| Decoding Capability | 04S3-P4 · 1×4K@30, 4×5MP@25, 4×4MP@25, 4×3MP@2508S3-P8 · 1×4K@30, 4×5MP@25, 4×4MP@25, 4×3MP@25, 6×1080P@30, 8×720P@30 |
| Decoding Capability Description | The resolution of each channel cannot exceed 4000 pixels in length and 3000 pixels in width |
| Audio Compression | G.711A, G.711U |
Network
| Incoming Bandwidth | 64 Mbps |
| Outgoing Bandwidth | 48 Mbps |
| Remote Users | 128 |
| Protocols | TCP/IP, P2P, UPnP, NTP, DHCP, PPPoE, HTTP, HTTPS, DNS, DDNS, SMTP, RTSP, IPv4 |
| Browser (Plugin) | IE10, IE11, Chrome 45+, Edge 79+, Firefox 52+ |
Video/Audio Input
| IP Video Input | 04S3-P4 · 4-ch08S3-P8 · 8-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 | 04S3-P4 · 1/408S3-P8 · 1/4/6/8/9 |
| Corridor Mode Screen | 04S3-P4 · 3/408S3-P8 · 3/4/5/7/9 |
| Snapshot | FTP/Schedule/Event Snapshot; 1-ch snapshot (max. D1 (720×576) video resolution, with D1 snapshot resolution) |
Recording
| Recording Resolution | 8 MP / 6 MP / 5 MP / 4 MP / 3 MP / 1080P / 960P / 720P / D1 / 2CIF / CIF |
| Synchronous Playback in Local | 04S3-P4 · 4-ch08S3-P8 · 8-ch |
Smart
| VCA Detection by IPC | Face Detection, SIP (Intrusion Detection, Cross Line Detection, Enter Area, Leave Area), Ultra Motion Detection (UMD) |
| Smart by IPC | Total 4-ch (Face Detection, SIP, UMD) |
| VCA Search | Face Snapshot Search, Behavior Search |
Alarm
| General Alarm | 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 | 21 languages: Chinese, English, Vietnamese, Thai, Turkish, Spanish (Latin America), Portuguese (Brazil), Spanish, Portuguese, French, German, Italian, Dutch, Polish, Czech, Hungarian, Slovak, Russian, Hebrew, Arabic, Ukrainian |
Hard Disk
| SATA | 1 SATA Interface |
| Capacity | Up to 10 TB for each HDD (the maximum HDD capacity varies with environment temperature and hard disk size) |
External Interface
| Network Interface | 1 RJ45 10 M/100 M self-adaptive Ethernet Interface |
| USB | Rear panel: 2 × USB 2.0 |
| RS485 | N/A |
| RS232 | N/A |
| Alarm In | N/A |
| Alarm Out | N/A |
| Power Supply | 04S3-P4 · DC 48 V / 1.35 A08S3-P8 · DC 52 V / 1.8 A |
PoE
| PoE Interface | 04S3-P4 · 4 × RJ45 10 M/100 M self-adaptive Ethernet Interface08S3-P8 · 8 × RJ45 10 M/100 M self-adaptive Ethernet Interface |
| Max Power | 04S3-P4 · Max 30 W for single port, Max 54 W in total08S3-P8 · 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) | ≤ 9 W |
Dimensions
| Weight (without HDD) | ≤ 1.1 kg (2.43 lb) |
| Dimensions | 260 mm × 240 mm × 46 mm (10.2" × 9.4" × 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 × 240 × 46 mm (10.2" × 9.4" × 1.8") |
| Weight (without HDD) | ≤ 1.1 kg (2.43 lb) |
| Power supply | DC 48 V / 1.35 A (04S3-P4) · DC 52 V / 1.8 A (08S3-P8) |
| Consumption (without HDD) | ≤ 9 W |
Rear panel — all interfaces
Optional Mounting Accessories
Order together with the camera to save shipping.
RM-1U-2601 HDD 1U NVR rack mount
4/8-Channel PoE NVR FAQ — NVR301-S3-P Series
How many cameras can the NVR301-08S3-P8 power directly?
The NVR301-08S3-P8 records 8 IP cameras and has 8 built-in PoE ports (75 W total); the NVR301-04S3-P4 handles 4 cameras with 4 ports (54 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 10 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 10 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.
What is the maximum camera resolution it records?
It records IP cameras up to 8 MP (4K), 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 64 Mbps across all channels.
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 48 Mbps.
Does it support face detection and smart search?
Yes, with UNV smart cameras: Face Detection plus SIP rules (intrusion, cross-line, enter/leave area) and Ultra Motion Detection on up to 4 channels. The NVR indexes these events for VCA Search — Face Snapshot Search and Behavior Search — so you jump straight to the right clip instead of scrubbing hours of video.
Can I connect Hikvision, Dahua or other non-Uniview cameras to the NVR301-08S3-P8?
ONVIF is not in the protocol list of the official datasheet for this series (it lists TCP/IP, P2P, UPnP, NTP, DHCP, PPPoE, HTTP, HTTPS, DNS, DDNS, SMTP, RTSP and IPv4). Uniview cameras are the safe choice for plug and play on the PoE ports. If you plan to mix brands, send us the camera models before ordering and we will confirm whether they can be added and which functions will work.
Can I add a fifth camera to the NVR301-04S3-P4 through an extra PoE switch?
No. The limit is the IP video input, 4 channels on the 04S3-P4 and 8 on the 08S3-P8, not the number of ports. An extra switch on the network port only helps when cameras are too far from the recorder or you need more PoE power, and those cameras still count toward the same 4 or 8 channels. If you expect more than 8 cameras, choose a 9-, 16- or 32-channel model instead.
Can the NVR301-08S3-P8 record eight 4K (8 MP) cameras at once?
Recording yes, within the 64 Mbps incoming bandwidth: eight cameras at 8 Mbps each use exactly 64 Mbps, so keep each 8 MP camera at or below 8 Mbps (Ultra 265 or H.265 make this easy). Decoding is the tighter limit: the recorder decodes 1 × 4K@30 or 4 × 5MP@25, so in multi-screen live view it shows the cameras' sub-streams and plays back 4K one camera at a time. On a 10 TB disk eight cameras at 8 Mbps keep about 14.5 days.
Can I run a PTZ camera or a camera with heater from the NVR301 S3-P PoE ports?
Only if the device needs 30 W or less: each port supports IEEE 802.3af/at with a 30 W maximum, and the total is 54 W (04S3-P4) or 75 W (08S3-P8). A compact PTZ drawing about 13 W is fine, and you could run 4 of them on the 04S3-P4 (52 W) or 5 on the 08S3-P8 (65 W). Large PTZs that need high-power PoE (802.3bt) or 24 V AC must have their own power supply.
The NVR301 S3-P network port is only 10/100 Mbps. Is that enough for remote viewing?
For this size of system, yes. Cameras plugged into the built-in PoE ports send video straight to the recorder, so their traffic does not pass through the network port; the port only carries remote viewing and playback, which the datasheet limits to 48 Mbps outgoing. In practice the real limit is usually the site's internet upload speed, so phones normally watch the sub-stream remotely. Gigabit only matters for larger recorders that take many cameras through an external switch.
Ordering questions — samples, shipping, payment, lead time and genuine stock — are answered once on our FAQ page.
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