| Model | NVR502-09B | NVR502-16B | NVR502-32B | 
| Video/Audio Input | 
| IP Video Input | 9-ch | 16-ch | 32-ch | 
| Audio Input | 1-ch, RCA | 
| Network | 
| Incoming bandwidth | 320Mbps | 
| Outgoing bandwidth | 160Mbps | 
| Remote Users | 128 | 
| Protocols | TCP/IP, P2P, UPnP, NTP, DHCP, PPPoE, HTTP, HTTPS, DNS, DDNS, SNMP, SMTP | 
| Browser | IE(IE10/11) for Windows
Firefox (version 52.0 and above) for Windows
Chrome(version 45 and above) for Windows
Edge(version 79 and above) for Windows | 
| Video/Audio Output | 
| HDMI/VGA Output | HDMI:
4K (3840x2160)@30, 1920x1080p@60, 1920x1080p@50, 1600x1200@60, 1280x1024@60, 1280x720@60, 1024x768@60
VGA:
1920x1080p@60, 1920x1080p@50, 1280x1024@60, 1600x1200@60, 1280x720@60, 1024x768@60 | 
| Recording Resolution | 16MP/12MP/8MP/6MP/5MP/4MP/3MP/1080p/960p/720p/D1/2CIF/CIF | 
| Audio Output | 1-ch, RCA | 
| Two-way Audio | 1-ch, RCA(Using the audio input and output) | 
| Audio Compression | G.711A, G.711U | 
| Synchronous Playback | 9-ch | 16-ch | 16-ch | 
| Liveview display | 1/4/6/8/9 | 1/4/6/8/9/16 | 1/4/6/8/9/16/25/32 | 
| Corridor Mode Screen | 3/4/5/7/9 | 3/4/5/7/9/10/12/16 | 3/4/5/7/9/10/12/16/32 | 
| Snapshot | 
| FTP/Schedule/Event Snapshot | 4-ch snapshot, up to D1 resolution | 
| Decoding | 
| Decoding format | Ultra 265/H.265/H.264 | 
| Live view/Playback | 16MP/12MP/8MP/6MP/5MP/4MP/3MP/1080p/960p/720p/D1/2CIF/CIF | 
| Capability | Ultra 265/H.265: 2 x 16MP@30, 2 x 12MP@30, 4 x 4K@30, 6 x 5MP@30, 8 x 4MP@30, 10 x 3MP@30, 16 x 1080P@30, 32 x 960P@25
H.264: 2 x 16MP(4800 x 2688)@30, 2 x 12MP@30, 2 x 4K@30, 4 x 5MP@30, 6 x 4MP@30, 8 x 3MP@30, 14 x 1080P@30, 30 x 720P@30, 32 x D1 | 
| Hard Disk | 
| SATA | 2 SATA interfaces | 
| Capacity | Up to 8TB for each disk
(The maximum HDD capacity varies with environment temperature) | 
| Smart | 
| VCA Detection by Camera | Vehicle Detection, Intrusion Detection, Cross Line Detection, Enter Area, Leave Area, Temperature Detection(Fire Detection, Smoking Detection, Temperature Measurement, Smoke and Fire Detection), UMD(Ultra Motion Detection), Video Metadata, Traffic Monitoring | 
| VCA Search | Motor Vehicle Search, Non-Motor Vehicle Search, Human Body Search, General Search, People Counting Report | 
| People Counting | People Flow Counting, Crowd Density Monitoring | 
| Smart Intrusion Prevention (SIP), Vehicle Detection, UMD, Video Metadata by Camera | Total 8-ch | 
| General Alarm | 
| General Alarm | Defocus Detection, Scene Change Detection, Object Left Behind, Object Removed, Auto Tracking, Motion, 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 | 
| External Interface | 
| Network Interface | 2 RJ-45 10M/100M/1000M self-adaptive Ethernet Interface | 
| USB Interface | Front: 1 x USB2.0, Rear panel: 1 x USB3.0, 1 x USB2.0 | 
| RS232 | NA | 
| RS485 | 1 | 
| Alarm In | 8-ch | 
| Alarm Out | 2-ch | 
| General | 
| Power Supply | 12V DC/3.3A
Power Consumption: ≤ 20W (without HDD) | 
| Working Environment | -10°C~+ 55°C (+14°F~+131°F), Humidity ≤ 90% RH (non-condensing) | 
| Dimensions (W×D×H) | 380mm × 315mm × 53mm (15.0" × 12.4" × 2.1") | 
| Weight (without HDD) | ≤ 2Kg (4.40lb) | 
| 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 |