| Model | AT-NH-3804FC-F4/AT-NH-4804FC-F4 |
| System | Main chip | Hi3520D V200 |
| OS | LINUX |
| System Resources | Multi-channel Realtime recording, Multi-channel playback, Multi-channel network operation, USB Backup |
| Interface | Operation menu | 16-bit true color graphical menu interface, mouse operation supported |
| Display | 1/4 display（take the pure coaxial input mode as an example） |
| Video | Format | H.264 |
| Output | VGA、HDMI |
| Preview | 4*1080N |
| Recode | 4*1080N |
| Decord | 4*1080N |
| Multi-mode Input | AHD： 4*1080N；4*720P；4*960H |
| Hybrid： 2*720P（Analog）+2*720P（IP）; |
| NVR：8*1080P;12*960P;8*720P; 4*1080P; 4*720P; 1*1080P |
| Motion Detect | Each view window can set 192（16*12）detection area,can set multi-level sensitivity (only for local channel) |
| Audio | Audio | G.711A |
| Intercom | Support |
| Recorind and Playback | Recording mode | Manual、Alarm、Motion Detect、Timer |
| Local playback | 4 Channel（when Analog mode） |
| Video search | Time, Date,Event,Channel search |
| Storage and Backup | Storage | Local HDD, Network |
| Backup | Network back, USB Drive, HDD |
| Port | Video Input | 4 * BNC |
| Video Output | 1 * VGA，1 * HDMI |
| Audio Input | 4 * RCA |
| Audio Output | 1 * RCA |
| Alarm Input | Optional（Max: 4 channels） |
| Alarm Output | Optional（can be 1 channel） |
| Network port | RJ45 10M/100M |
| PTZ Control | 1 * RS485 Support multipal PTZ Contract |
| USB port | 2 * USB Port |
| HDD Port | 2 * SATA hdd ports（up to 6T for each one） |
| Others | Power | 1*HDD: 12V/2A 2*HDD: 12V/5A |
| Power consumption | Less than 15W（no HDD） |
| Working temperature | 0℃—+55℃ |
| Working humidity | 10%—90% |
| Atmospheric pressure | 86kpa—106kpa |
| package Size | 42.5*33.5*53.5CM |
| Weight | 12kg(10PCS） |
