NVR / Recorders › NVR301-04S3 / 08S3 / 16S3
Uniview (UNV)S3 Series · 1× SATA HDD
1-HDD Network Video Recorder · S3 Series
NVR301-04 / 08 / 16S3
4 / 8 / 16-channel network video recorder — Ultra 265 compression, 4K HDMI output, records cameras up to 8MP, ONVIF certified for third-party IP cameras.
8MP · max recordingUltra 265 · low storage4K HDMI · + VGA simultaneous1× SATA · up to 10 TBONVIF · certified21 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 04S3; pick the 08S3 or 16S3 if you may add cameras later. Highlighted rows in the spec table below show every difference between the three.
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How many terabytes for your channels and days? Use the storage calculator →
Need the PDF datasheet? Get it on WhatsApp →Compliance:CEFCCULRoHSWEEEONVIFNDAA
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The Uniview NVR301-S3 Series is a 1-HDD network video recorder offered in three sizes: NVR301-04S3 (4-ch), NVR301-08S3 (8-ch) and NVR301-16S3 (16-ch). All three record cameras up to 8MP with Ultra 265 / H.265 / H.264 compression, output simultaneously over 4K HDMI and VGA, and carry ONVIF certification. 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 plus four cameras is a complete kit — one disk, one screen, done.
Growing businessesBuy channels you don't use yet: the 08S3/16S3 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.
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.
Mixed-brand projectsONVIF certification means existing third-party IP cameras are more likely to keep working — no need to replace the whole site.
Quick incident lookupFace Snapshot Search and Behavior Search narrow hours of footage down to the exact clip — useful when someone needs to find "the person who came in around 3pm."
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 64 Mbps total)
- Alarm in/out wiring for sirens or sensors
- Audio input — it has a 3.5mm audio output only (camera-side mics still record)
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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 (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. Finds the moment.
Two real capabilities from the datasheet that matter every day: storage efficiency and fast retrieval.
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 SEARCH
Find the moment, not the footage
Built-in face detection on up to 4 channels feeds Face Snapshot Search and Behavior Search — the recorder indexes up to 2 million face snapshots so you jump straight to the clip you need instead of scrubbing hours of footage.
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.
NVR301-04S3live view split 1/4 · sync playback 4-ch
4cameras
NVR301-08S3live view split up to 9 · sync playback 8-ch
8cameras
NVR301-16S3live view split up to 16 · sync playback 16-ch
16cameras
Who uses it, where it goes and how to install it
Written for the NVR301-04S3, 08S3 and 16S3 from the official datasheet: 4, 8 or 16 IP channels up to 8 MP, 64 Mbps incoming bandwidth, 1 SATA bay up to 10 TB, 4K HDMI plus VGA, DC 12 V power and no built-in PoE.
Which size suits which installation
- NVR301-04S3: shops and homes with up to 4 cameras — With only 4 channels sharing 64 Mbps, each camera can use up to 16 Mbps, so 8 MP cameras record at full quality. It draws ≤ 5 W without the disk, which keeps a small UPS running for a long time.
- NVR301-08S3: offices, restaurants and clinics — 8 channels at up to 8 Mbps each when all are used, suited to 2–5 MP cameras on an existing PoE switch; buy it with 4–6 cameras today to leave room to grow.
- NVR301-16S3: warehouses, schools, small campuses — 16 channels at 4 Mbps each fill the 64 Mbps input, which suits 2–4 MP cameras spread over several buildings on one network; plan the disk carefully because 16 cameras share one drive of up to 10 TB.
- Upgrades of sites that already have a PoE switch — No PoE in the recorder means it simply joins the existing network and switch; smart events come from up to 4 Uniview smart cameras in total, with Face Snapshot Search over up to 2 million face snapshot records.
Where and how to install the recorder
- Shelf or 1U rack, in a locked place — The 260 × 240 × 46 mm case sits on a shelf or in a 19-inch rack with the RM-1U-260 tray. Keep it in a locked office or network cabinet, not on the shop counter where it can be carried away with the recording.
- Cool, dry and ventilated — It works from -10 °C to 55 °C at ≤ 90% RH non-condensing, but the datasheet notes that the largest usable disk depends on room temperature. Leave the vents free and avoid roof spaces, kitchens and closed metal boxes in the sun.
- Cameras through a PoE switch — Cameras connect to a PoE switch (or have their own 12 V supply), and the switch connects to the recorder's single 10/100 Mbps RJ45 port. Keep every camera run within 100 m of Cat5e/Cat6 copper and the total camera bitrate under the 64 Mbps input.
- Power and UPS — It runs from DC 12 V / 2 A and draws ≤ 5 W without the disk. Put the recorder, the PoE switch and the router on one UPS, because the cameras stop when the switch loses power even if the recorder keeps running.
- Disk, monitor and audio — Fit one 3.5-inch SATA surveillance-grade disk of up to 10 TB before power-on. HDMI (up to 4K) and VGA work at the same time; the 3.5 mm audio output can feed a small speaker to listen to cameras with microphones.
Planning table: channels, bandwidth, disk and retention
The three sizes share the same 64 Mbps input, 10 TB single disk, outputs and DC 12 V supply; only the channel count, the decoding list and the split-screen options change. Adding channels divides both the bandwidth and the disk between more cameras.
| NVR301-04S3 | NVR301-08S3 | NVR301-16S3 | |
|---|---|---|---|
| IP camera channels | 4 | 8 | 16 |
| Incoming / outgoing bandwidth | 64 / 48 Mbps | 64 / 48 Mbps | 64 / 48 Mbps |
| Bandwidth per channel, all channels used | 16 Mbps | 8 Mbps | 4 Mbps |
| Hard disk | 1 × SATA, ≤ 10 TB | 1 × SATA, ≤ 10 TB | 1 × SATA, ≤ 10 TB |
| PoE ports | — | — | — |
| Decoding | 1×4K@30, 4×5MP@25 | + 6×1080P@30, 8×720P@30 | + 16×D1@25 |
| Smart events from cameras (Face, SIP, UMD) | 4-ch total | 4-ch total | 4-ch total |
| Live view split / synchronous playback | 1/4 · 4-ch | 1/4/6/8/9 · 8-ch | 1/4/6/8/9/16 · 16-ch |
| Days on 4 TB, all channels at 4 Mbps | 23.1 | 11.6 | 5.8 |
| Days on 10 TB, all channels at 4 Mbps | 57.9 | 28.9 | 14.5 |
- Pick the 04S3 for up to 4 cameras, including 8 MP: each can use up to 16 Mbps.
- Pick the 08S3 for 5–8 cameras of 2–5 MP at up to 8 Mbps each.
- Pick the 16S3 for 9–16 cameras of 2–4 MP set to about 2–4 Mbps each; for 16 cameras of 4K, choose a recorder with more incoming bandwidth.
Retention assumes continuous 24-hour recording at 4 Mbps per camera (a typical H.265 main stream for a 4 MP camera): days = TB × 10^12 ÷ (cameras × 4,000,000 ÷ 8 × 86,400). Ultra 265, lower frame rates or event-only recording give more days; on the 16S3, 16 cameras at 4 Mbps use the full 64 Mbps, so 2–3 Mbps per camera leaves headroom.
Full Specifications
Complete official specifications from the manufacturer's datasheet (technical values in English).
Highlighted rows differ between the three models:NVR301-04S3 · 4-chNVR301-08S3 · 8-chNVR301-16S3 · 16-ch
Decoding
| Decoding Format | Ultra 265, H.265, H.264 |
| Decoding Capability | 04S3 · 1×4K@30, 4×5MP@25, 4×4MP@25, 4×3MP@2508S3 · 1×4K@30, 4×5MP@25, 4×4MP@25, 4×3MP@25, 6×1080P@30, 8×720P@3016S3 · 1×4K@30, 4×5MP@25, 4×4MP@25, 4×3MP@25, 6×1080P@30, 8×720P@30, 16×D1@25 |
| 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 · 4-ch08S3 · 8-ch16S3 · 16-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 |
| 3.5mm Audio Output | 1-ch |
| Liveview Display | 04S3 · 1/408S3 · 1/4/6/8/916S3 · 1/4/6/8/9/16 |
| Corridor Mode Screen | 04S3 · 3/408S3 · 3/4/5/7/916S3 · 3/4/5/7/9/10/12/16 |
| 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 · 4-ch08S3 · 8-ch16S3 · 16-ch |
Smart
| Smart by IPC | Total 4-ch (Face Detection, SIP, UMD) |
| VCA Search | Face Snapshot Search, Behavior Search |
| Capacity of Snapshot Records | 2 millions records for face snapshot |
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 | 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) | ≤ 5 W |
Dimensions
| Weight (without HDD) | ≤ 0.98 kg (2.16 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) | ≤ 0.98 kg (2.16 lb) |
| Power supply | DC 12 V / 2 A |
| Consumption (without HDD) | ≤ 5 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 — NVR301-04S3/08S3/16S3
How many IP cameras does each model take?
The NVR301-04S3 records 4 IP cameras, the 08S3 records 8 and the 16S3 records 16 — all at up to 8MP (4K) per channel with 64 Mbps of incoming bandwidth. Each model plays back all of its channels synchronously on the local monitor.
Does it have PoE, and how do I power the cameras?
No built-in PoE — there is one 10/100M RJ45 network interface, so cameras connect via your LAN and are powered by a separate PoE switch or local supplies. The recorder runs on DC 12V/2A, draws under 5W without HDD and stays fanless-quiet on a shelf or counter.
What is the maximum HDD size?
One SATA bay, up to 10 TB per surveillance hard drive (maximum varies with ambient temperature and disk model). Ultra 265 compression cuts recording size dramatically versus H.264, so the same 10 TB disk keeps footage for weeks longer at the same camera count.
Can it find a person in the recordings?
Yes — with face detection cameras on up to 4 channels, the recorder indexes up to 2 million face snapshot records and offers Face Snapshot Search plus Behavior Search. General alarms include motion detection, human body detection, tampering, audio detection and video loss.
Is it ONVIF certified for third-party cameras?
Yes, the series is ONVIF certified, so third-party IP cameras integrate over your network. Certifications include CE, FCC, UL, RoHS and WEEE, and the 21-language GUI covers Latin American Spanish and Brazilian Portuguese for local installers and operators.
What outputs does it have for monitors and remote viewing?
HDMI up to 4K (3840×2160) at 30 Hz, VGA up to 1920×1080 at 60 Hz and a 3.5mm audio output. Remotely, up to 128 users connect over P2P, DDNS, HTTPS or RTSP with 48 Mbps outgoing, via Chrome 45+, Edge 79+, Firefox 52+ or IE10/11 with plugin.
How many 4K (8 MP) cameras can the NVR301-16S3 record?
The 64 Mbps input is the limit: at a typical 8 Mbps per 4K camera that is about 8 cameras (8 × 8 = 64 Mbps), and 4K on all 16 channels would need each camera at 4 Mbps or less. For viewing, the decoder handles 1 × 4K@30 at full resolution (plus 4 × 5MP@25), so multi-camera screens use lower-resolution streams and you open one camera full screen to see 4K detail.
Which hard drive should I use in the NVR301-08S3, and how many days will it record?
One 3.5-inch SATA surveillance-grade drive designed for 24/7 writing, up to 10 TB; the datasheet notes the usable maximum also depends on room temperature. With 8 cameras at 4 Mbps recording continuously, 4 TB keeps about 11.6 days and 10 TB about 28.9 days; the 04S3 doubles these and the 16S3 halves them. Motion-based recording and Ultra 265 extend the time.
Will the NVR301-S3 do human or intrusion detection on my existing ordinary cameras?
No. The datasheet lists smart functions only as Smart by IPC: face detection, SIP and UMD events are produced by Uniview smart cameras, up to 4 channels in total, and the recorder stores and searches them. Ordinary cameras get motion detection, tampering and video-loss alarms. Basic motion detection triggers on rain, headlights and moving trees, so for fewer false alarms use smart cameras on the 4 most important views.
Is the single 10/100 Mbps port on the NVR301-16S3 a bottleneck?
Not if the system is planned within the recorder's own limits. A full-duplex 100 Mbps link carries up to 100 Mbps in each direction, while the recorder accepts at most 64 Mbps from cameras and sends at most 48 Mbps to remote viewers. Use a PoE switch with enough ports and connect the recorder and the router to that same switch, so camera traffic does not pass through the router.
Should I choose the NVR301-08S3 or the PoE version NVR301-08S3-P8?
Recording specs are the same on both datasheets (8 channels, 64 Mbps, 10 TB, 4K HDMI). The 08S3-P8 adds 8 PoE ports with 75 W in total (30 W per port) and uses a DC 52 V / 1.8 A supply, so cameras plug straight into it. The 08S3 runs on DC 12 V / 2 A at ≤ 5 W and suits sites that already have a PoE switch or cameras spread far from one point, where a switch near the cameras saves cable.
Ordering questions — samples, shipping, payment, lead time and genuine stock — are answered once on our FAQ page.
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