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Description
GST-MDR304G is a high level SD card mobile digital video recorder specially designed for vehicle surveillance purpose. It adopts high speed processor and embedded operating system, and applies various advanced technologies in IT field, such as A/V codec, high capacity hard disk storage, network streaming media, A/V noise reduction, wide range voltage design.


Application
Bus, School bus, Logistics vehicle, Taxi, Police car, Special purpose vehicle, Train/metro, Ship/boat.etc.

Features 
1, Industrial level design;
2, Mini device;
3, Advanced audio/video compression technology;
4, 4-channel video input and 2-channel audio input;
5, ASF standard file format;
6, 3G, GPS, Wi-Fi modules optional;
7, Local and remote PTZ control;
8, Up to 2 SD cards;
9, Patent UPS power-off protection design;
10, Fast startup;
11, Optional function: Bi-directional voice communication;
12, Central management software provided(optional);
...
Specification

Item		Description
Operation system		Linux
GUI		Setup system parameters with remote controller
Security management		Support user password, supervisor password management; support encryption transmission
Video	Video input/output	4-channel CVBS video input, 1-channel CVBS video output; 1.0Vp-p, 75Ω
	Dual stream	Support
	OSD	Time & date, vehicle ID, GPS, etc.
	compression	H.264. Hisilicon high performance processor is applied.
	Preview function	Single channel, 4-picture splicing preview, support event triggered full screen and splicing switching display function
	Video frame rate	PAL: 100 frame/sec, up to 25 frame/sec for single channel NTSC: 120 frame/sec, up to 30 frame/sec for single channel
	Video resolution	CIF, HD1, D1 adaptive, support up to 2-channel D1 and 2-channel CIF
	Video quality	Level 1 to 5 video quality adaptive, level 1 best, level 5 lowest
	Video Bit rate	CIF: 256Kbps ~ 1.5 Mbps, 8 levels of bit rate optional HD1: 600Kbps ~ 2 Mbps, 8 levels of bit rate optional D1: 800Kbps ~ 3Mbps, 8 levels of bit rate optional
Audio	Recording mode	Startup recording by default, support timing, alarm & event trigger, manual recording
	Compression	G.726
Recording	Storage media	SD card, support 1G ~ 32G SD card, support SDHC standard
		Support double SD cards cyclic recording; record another card when the previous card is recorded full, and start cyclic deletion (delete the earliest recording)
	File format/system	ASF/ FAT32
	Recording mode	Startup recording by default, support timing, alarm & event trigger, manual recording
	Recording search	Search recording video files by time, type, storage device, etc.
	Recording playback	Support local playback, support up to 4-channel synchronous playback, and analyze the vehicle message in the file at the same time
		Support fast forward, fast backward, play, pause controls, support 2, 4, 8, 16 times speed fast forward or fast backward, support the control of playback by time
Alarm	Alarm input	4-channel alarm input
	Alarm recording	Pre-recording function, 15 seconds pre-recording of alarm, recording time after alarm can be adjusted in between 30 sec ~ 30 min
	Alarm output	2-channel alarm output
	Storage space alarm	Support the setting of remain storage space alarm function
	Functional alarm	Overspeed alarm, acceleration alarm, motion detection alarm
Communication interface	Serial interface	Support one RS232 interface
	Network interface	RJ45, 10M/100M self-adaption Ethernet interface
Wireless transmission (optional)		Built-in 3G wireless transmission module, WCDMA, CDMA2000, TD-SCDMA systems optional; Compatible with GPRS, EDGE; Built-in Wi-Fi module;
Data remote transmission channel selection		Support 3G/Wi-Fi transmission, Wi-Fi priority transmission strategy, remote download;
PTZ control		Support PTZ control function by local remote controller or client software;
Parameter configuration		Support parameter configuration;
GPS, G-sensor (optional)		Support built-in GPS module with geographic coordinate, speed information, etc.
System upgrade		Support SD card upgrade, remote upgrade
Power supply & consumption	Power supply management	1. ACC startup/shutdown 2. Delay shutdown 3. Timing startup/shutdown
	Input voltage	DC:+8V ~ +36V
	Output voltage	+12V@1.5A；+5V@0.5A
	Power-off protection	Patent UPS power-off protection technology, ensure the integrality of record data when accidental power failure occurs
	Power consumption	Less than 5W in normal working state; less than 0.5W in standby state
Working environment	Temperature	-25 ~ +70'C
	Humidity	20% to 95%
Dimension		112(W) x36(H) x138(D) mm
Weight		Net weight: 900g, gross weight: 1100g