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> Up to 4 cameras with SXGA(1280×1024) display
> H.264 dual-stream video compression
> Each channel@CIF and special channel@D1 recording
> HDMI/VGA/TV simultaneous video output
> Full channel synchronous realtime playback
> 3D intelligent positioning with DAHUA PTZ dome
> Up to 4 SATA HDDs, 1 eSATA, 2 USB2.0
> Multiple network monitoring: Web viewer, CMS(DSS/PSS) & DMSS
> Built-in 5.6 inch screen(-UD only)

Model DH-DVR0404AL-U DH-DVR0404AL-UD
Main Processor Embedded processor
Operating System Embedded LINUX
Input 4 channel, BNC
Standard NTSC(525Line, 60f/s), PAL(625Line, 50f/s)
Input 4 channel, BNC
Output 1 channel, BNC

Two-way Talk

1 channel Input, 1 channel Output, BNC

Interface 1 HDMI, 1 VGA, 1 TV, BNC
LCD / 5.6-inch color LCD
Resolution 1280×1024, 1280×720, 1024×768, 800×600
Display Split 1/4

Privacy Masking

4 rectangular zones (each camera)


ATM/POS information, camera title, time, video loss, camera lock, motion detection, recording

Video/Audio Compression H.264 / G.711
Resolution D1/4CIF(704×576/704×480) / HD1(352×576/352×480) / 2CIF(704×288/704×240) / CIF(352×288/352×240) / QCIF(176×144/176×120)

Record Rate

Main Stream

Channel 1: D1/CIF/QCIF (1~25/30fps);
Channel 2~4: CIF/QCIF (1~25/30fps), D1 (1~6/7fps)

Sub Stream QCIF(1~25/30fps), CIF(1-6/7fps)
Bit Rate 32~2048Kb/s

Record Mode

Manual, Schedule(Regular(Continuous), MD, Alarm), Stop

Record Interval

1~120 min (default: 60 min), Pre-record: 1~30 sec, Post-record: 10~300 sec

Video Detection & Alarm

Trigger Events

Recording, PTZ, Tour, Alarm, Email, FTP, Buzzer & Screen tips

Video Detection Motion Detection, MD Zones: 396(22×18), Video Loss & Camera Blank
Alarm Input 6 channel
Relay Output 3 channel
Playback & Backup
Sync Playback 1/2/4
Search Mode ATM/POS, Time/Date, Alarm, Motion Detection & Exact search (accurate to second)
Playback Functions Play, Pause, Stop, Rewind, Fast play, Slow play, Next file, Previous file, Next camera, Previous camera, Full screen, Repeat, Shuffle, Backup selection, Digital zoom
Backup Mode USB Device / Network
Ethernet RJ-45 port (10/100M)
Network Functions TCP/IP, UDP, DHCP, DNS, IP Filter, PPPOE, DDNS, FTP, Email, Alarm Server

Max. User Access

20 users

Smart Phone iPhone, iPad, Android, Windows Phone
Internal HDD 4 SATA ports

External HDD

1 eSATA port

Auxiliary Interface

2 ports (1 Rear), USB2.0


1 port, For PC communication & Keyboard


1 port, For PTZ control

Power Supply AC 100~240 V, 50/60 Hz
Power Consumption 18W-22W
Working Environment

-10°C ~+55°C / 10~90%RH / 86~106kpa

Dimension(W×D×H) ATM box, 200mm×130mm×320mm
Weight 3.5KG-4.5KG(without HDD)
Class Date Title Language Type Download
Datasheet 2014-06-23 DH-DVR0404AL-U/UD_Datasheet_20140623 English PDF pdf
Class Date Title Language Type Download
Class Date Title Language Type Download
Class Date Title Language Type Download
Class Date Title Download
Images 2017-08-28 DVR0404AL-U/UD