| Model | 
NVR508-16B | 
NVR508-32B | 
NVR508-64B | 
| Video/Audio Input | 
| IP Video Input | 
16-ch | 
32-ch | 
64-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 | 
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 | 
16-ch | 
| Live View Display | 
VGA: 1/4/6/8/9/16 HDMI: 1/4/6/8/9/16 | 
VGA: 1/4/6/8/9/16/25/36 HDMI: 1/4/6/8/9/16/25/36 | 
Simultaneous Output:  VGA: 1/4/6/8/9/16/25/36/64 HDMI: 1/4/6/8/9/16/25/36/64 Independent Output:  VGA: 1/4/6/8/9/16/25/32 HDMI: 1/4/6/8/9/16/25/32 | 
| Corridor Mode Screen | 
3/4/5/7/9/10/12/16 | 
3/4/5/7/9/10/12/16/32 | 
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 | 
12MP/8MP/6MP/5MP/4MP/3MP/1080p/960p/720p/D1/2CIF/CIF | 
| Capability | 
Ultra 265/H.265: 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, 36 x 720p@30, 64 x D1 H.264: 2 x 12MP@30, 2 x 4K@30, 4 x 5MP@30, 6 x 4MP@30, 8 x 3MP@30, 14 x 1080p@30, 28 x 960p@25, 30 x 720p@30, 64 x D1 | 
| Hard Disk | 
| SATA | 
8 SATA interfaces | 
| Capacity | 
Up to 12TB for each disk | 
| Disk Group | 
Support | 
| Smart | 
| VCA Detection by Camera | 
Intrusion Detection, Cross Line Detection, Enter Area, Leave Area, Defocus Detection, Scene Change Detection, Object Left Behind, Object Removed, Auto Tracking, UMD(Ultra Motion Detection) | 
| VCA Search | 
Behavior Search, People Counting Report, Vehicle Search | 
| People Counting | 
People Flow Counting, Crowd Density Monitoring | 
| Smart Intrusion Prevention (SIP), Vehicle Detection, UMD by Camera | 
Total 8-ch | 
| General Alarm | 
| General Alarm | 
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: 2 x USB2.0, Rear panel: 1 x USB3.0 | 
| RS232 | 
NA | 
| RS485 | 
1 | 
| Alarm In | 
16-ch | 
| Alarm Out | 
4-ch | 
| General | 
| Power Supply | 
100~240V AC Power Consumption: ≤ 32W (without HDD) | 
| Working Environment | 
-10°C~+ 55°C (+14°F~+131°F), Humidity ≤ 90% RH (non-condensing) | 
| Dimensions (W×D×H) | 
442mm × 426mm × 89mm (17.4" × 16.8" × 3.5") | 
| Weight (without HDD) | 
≤ 4Kg (8.80lb) | 
| 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 |