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UDM1A-4: 4 Channel TVI Mobile DVR

Archived: See Updated DVRs

4 Channel TVI Mobile DVR


  • User-friendly GUI providing easy and flexible operations.
  • Supports connecting high-definition TVI camera.
  • 4 analog channels of audio & video inputs connectable; each channel supports up to 720p resolution with H.264 encoding technology.
  • Two HDD/SSD hard disks with 1T capacity can be plugged for data storage.
  • Specialized aviation connectors ensuring signal stability.
  • Ignition start, delay (0 to 6h) shutdown and 24-hour scheduled startup/shutdown.
  • Software-based firewall supported.

Model Number


Video compression


Analog Video input

4-ch; Aviation plug (1.0 Vp-p, 75 Ω)

Audio input

4-ch; Aviation plug (linear level, 1kΩ)

Encoding resolution

Main stream: 720p/WD1/4CIF/CIF; Sub-Stream: CIF/QCIF

Frame rate

1 to 30fps

Audio input

4-ch, RCA (2.0 Vp-p, 1 KΩ)

Audio compression


Stream type

Video, Video & Audio

Dual stream


HDD Type

2 × 2.5 inch hard disk (HDD/SSD)

HDD Capacity

Up to 1TB each

Two-way audio



4 high/low level signal inputs

Alarm input

3-ch high/low level signal input

Alarm output

2-ch relay signal output

Network interface

1 × 10M/100M self-adaptive RJ45 Ethernet interface

Serial interface

2 × RS-232, 1 × RS-422

USB port

1 × standard USB 2.0 in front panel;

1 × aviation plug USB 2.0 in in rear panel

SIM card

1 SIM/UIM card slots

Operating system


Operating method

Mouse, IR remote control, and Web control

Power supply

Input: 8 to 36 VDC; Output: 12 VDC/1 A, 5 VDC/1 A


≤ 20 W

Working temperature

-25º C to +70º C (-13º F to 158º F)

Working humidity

10% to 90%

Dimensions (W×D×H)

202 × 85.5 × 253 (7.95 × 3.37 × 9.96 Inches)

Weight (without HDDs/SSDs)

Approx. 3 kg (6.61 lb)

UDM1A-4: 4 Channel Mobile DVR

Spec Sheet

Ultra Products Support Page