Features And Specifications; Overview; Function - Dahua HFD23 User Manual

1 Features and Specifications

1.1 Overview

This series mobile NVR is a high-end HD digital video surveillance management product.

It Integrates image process technology, wireless network technology, GPS technology,
structure technology and vehicle information sampling and process technology together.

Uses strong aluminum alloy case and adopts one 2.5-inch HDDs and one SD card as the
storage media. It supports built-in 3G, WIFI wireless transmission mode and GPS module
（optional）.

Installed on the vehicle, it can realize local audio/video storage and vehicle information
sampling, at the same time it can transmit real-time video and vehicle information to the
remote management centre and establish real-time remote wireless surveillance
management system.
This series NVR can be widely used in many vehicle areas or mobile surveillance areas such as
long-distance passenger transport, city public transportation, public security system, road
administration, logistics vehicle.
Important
Please note, GPS, WIFI, 3G function are optional. Please make sure you purchased product
support these functions.

1.2 Function

Slight difference may be found due to different series products.
It has analog output port, VGA port. You can use monitor or displayer, video wall to realize
surveillance function.
System supports TV/VGAI output at the same time.

Storage function
Special data format to guarantee data security and can avoid vicious data modification.

Compression format
Support multiple-channel audio and video signal. An independent hardware decodes the audio
and video signal from each channel to maintain video and audio synchronization.

Backup function
Support backup operation via USB port (such as flash disk, portable HDD)
Client-end user can download the NVR file to local HDD to backup via network.

Record playback function
Support each channel real-time record independently, and at the same time it can support search,
forward play, network monitor, record search, download and etc.
Support various playback modes: slow play, fast play, backward play and frame by frame play.
Support time title overlay so that you can view event accurate occurred time
Support specified zone enlargement.
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