Feature 	Specification
System 	User Interface 	Graphic User Interface (OSD)
 OS 	Embedded Linux
Operation Mode 	preview, record, playback, backup, network  
Password Security 	 Multi-level user management
A/V Input 	Video input 	4 in, BNC
Audio input 	1 in, RCA
A/V Output 	HDMI output 	Support 1024X768,1280X1024, 1440X900, 720P, 1080P
VGA output
Display 	1/4  optional
Video standard 	PAL/NTSC
Loop 	NO
CVBS main output 	1 out, BNC; Resolution: PAL:704*576, NTSC: 704*480
Spot output 	NO
Audio output 	1 out,RCA
A/V encoding parameters 	Video compression 	H.264 
Display frame rate 	PAL:100 fps(4 x 25 fps); NTSC:120 fps(4 x 30 fps)
Recording frame rate 	PAL:100 fps(4 x 25 fps); NTSC:120 fps(4 x 30 fps)
Video encoding resolution 	PAL:WD1:960X576/WHD1:960*288/WCIF:480X288/D1:704X576/HD1:704*288/CIF 352X288 NTSC:WD1:960X480/WHD1:960*240/WCIF:480X240/D1:704X480/HD1:704*240/CIF 352X240
Video frame rate 	PAL: 1-25FPS  NTSC:1-30FPS
Video bit rate 	WCIF(CIF):384-768kbps, WD1(D1):768-1536Kbps,WHD1(HD1):512-1280kpbs,WQCIF(QCIF):192-384kbps
Stream Type 	Video & Audio/Video
Audio compression 	ADPCM
Recording mode 	Always/Schedule/Alarm recording/Motion detection recording
Video search 	Time/Channel/Event  
Audio bit rate 	8—32kbps 
Dual-stream 	Supports
Mobile phone Monitor 	Supports Android phone/iPhone/iPad/Blackberry
Recording resolution 	4CH WD1(D1) Recroding & 4CH WD1(D1) Playback (not realtime)/1CH realtime playback;
4CH WCIF(CIF) Recroding & 4CH WCIF(CIF) realtime playback; 
Playback simultaneously 	1—4 CH optional
HDD 	Type 	1 piece SATA
Maximum capacity 	4TB for each Sata connector
External connectors 	Voice talk 	NO
Record mode 	Audio & Video recording simultaneously 
Network protocol 	Supports IE/PPPoE/DDNS/DHCP
Domain name server 	Support ZEISIC, 88110, reelink, 3322, dyndns, no-ip, changeip, dnsexit  domain name server as default value.
Network   	1 RJ45 10M/100M
Serial port 	1 RS-485 serial port
E-SATA Connector 	NO
USB Connector 	2 USB
Firmware update 	Support USB update/Network update  
Alarm input 	NO
Alarm output 	NO
  	Operation Temperature 	-10℃--+55℃ 
Operation Humidity 	10%--90% 
Power supply 	12V 2A
Chassis 	Standard 1.0U
Dimension 	230mm (W)×315mm (D)×40mm (H) 
Weight(without HDD) 	≤1.5Kg