(1) The video compression is H. 264, supports VBR as well as CBR
(2) Can set up video picture quality and compression yard
(3) Adopt high performance criterion of embedded real-time multiple operating system (RTOS) and embedded processor
(4) All the codes are embedded in FLASH that the system is steadier and will not be interfered by external factors such as virus etc.
(5) Audio and alarm inputs / outputs
(6) Support PAL/NTSC4. 43/NTSC3. 58 video signals
(7) Recording resolution:352x240 (NTSC),352x288 (PAL)
(8) 6 kinds of record image quality for choosing
(9) Support TCP/IP agreement (support ARP, RARP, IP, TCP, PPPOE, DHCP, etc.)
(10) Support PPPOE, dial automatically again at the same time and support domain name mapping
(11) Support Manual video, timing video, motion detection and warning video
(12) USB Port:USB function for H6008AL and H6016AL
(13) Client PC can record compressed data stream, support record audio and video signals into the computer directly through Internet
(14) No.16 host computer allocate to 4 IDE channel separately, can drive 8 IDE hard disk at the same time
(15) Port of SATA at a high speed, more convenient to join
Specifications:
Model/Item AB-H6004AL AB-H6008AL AB-H6016AL
Compression Format H. 264, supports VBR as well as CBR
Operating system Embedded real-time operating system (RTOS)
Video Input BNCf-4,1.0VP-P,75¼+ BNCf-8,1.0VP-P,75¼+ BNCf-16,1.0VP-P,75¼+
Video Output A composite video output,A VGA output
Audio Input -8dB---22k, RCAf-4 -8dB---22k, RCAf-8 -8dB---22k, RCAf-16
Audio Output -8dB---92dB, RCAf-1
Display Frame Rate 704x576 (PAL), 704x480 (NTSC)
Record Resolution 352*288(PAL)
352*240 (NTSC)
Display Frame Rate 100fps(PAL)
120fps(NTSC) 200fps(PAL)
240fps(NTSC) 400fps(PAL)
480fps(NTSC)
Recording Frame Rate 100fps(PAL)
120fps(NTSC) 200fps(PAL)
240fps(NTSC) 400fps(PAL)
480fps(NTSC)
USB NO YES YES
Alarm Input NO or NC, 4CH NO or NC, 8CH NO or NC, 9CH
Alarm Output NO or NC, 4CH
Recording Mode manual video,timing video,motion detection video and warning video
Network Interface RJ45 10M/100M(LAN, Internet),Support TCP/IP agreement,PPPOE
PTZ Control RS485
HDD Support 8 parallel IDE & 2 SATA
Backup SATA,Network
Storage Temperature& Humidity -20--65fª / 20-95% RH (No Condenser)
Operation Temperature& Humidity -10--55fª / 20-80% RH (No Condenser)
Power Adapter 220/110V, 50/60HZ
Dimension (Lf-Wf-H) 440x435x97 mm
Weight Gross weight:10kg ;
Net weight:8kg
(1) TRIPLEX operation, multi client 4 users
(2) H.264 video compression
(3) Recording speed: 120 fps max
(4) loop-through, comp./S-VHS output / VGA out (option)
(5) Audio and alarm inputs / outputs
(6) Network connectivity by static or dynamic IP (DHCP, DDNS) support
(7) Recording resolution:704x480, 704x240, 352x240 (NTSC), 704x576, 704x288, 352x288 (PAL)
(8) Optional secondary storage / archiving via USB and CD-RW in .avi format file
(9) 3xHDD (Standard DC supply)
(10) Live picture and playback
(11) RS-485 interface for PTZ control
(12) Full graphic user interface
(13) Soft style power button prevents system failure by wrong operation
Specifications:
Model/Item AB-H5004AL
Compression Format H.264
Network Support 10/100 Base-TX Ethernet (RJ-45)
CPU 32 bits DSP
HDD Unlimited HDD space (Range in HDDx3) for USB 1.1 version
Unlimited HDD space (Range in HDDx2) for CD-RW mode
Video Input 4CH composite (BNC) NTSC/PAL system
Video Output Analog (BNC)/S-Video/Supports 1 Spot out (BNC)/4 Loop-through
Audio Input -8dB---22k, RCAf-4
Audio Output -8dB---92dB, RCAf-1
Display Frame Rate 720x576 (PAL), 720x480 (NTSC)
Record Resolution 704x576, 704x288, 352x288 (PAL)
704x480, 704x240, 352x240 (NTSC)
Display Frame Rate 100fps(PAL)/120fps(NTSC)
Recording Frame Rate 120/100 or 60/50 or 30/25
Alarm Input NO or NC, 4CH
Alarm Output NO or NC, 1CH
Recording Mode Continous, Motion detection and sensor activated
Recording Schedule Setting recording schedule per camera
Motion Detection Supports the setting of motion sensitivity per camera
PTZ Control Yes, RS485
Number of Connection 1 connection (1 or 4 CH video)
Remote Controller YES
System Recovery After Power Failure Auto-rebooting, auto-scan and recovery of data
System Operation Accessibility Button on front panel and IR remote controller
Remote S/W Remote viewer (4 CH)
Storage Temperature& Humidity -20--65fª / 20-95% RH (No Condenser)
Operation Temperature& Humidity -5--50fª / 20-80% RH (No Condenser)
Power Supply 100~240VAC/ DC 12V, 5A (Adapter supplying)
Dimension (Lf-Wf-H) 370x360x70 mm
Weight Gross weight:6kg ;
Net weight:4.5kg
Network functions: Backup, browse, and control thru LAN; Browse via IE; Backup speed faster than USB
Connection to external hard disk: IDE port directly to external hard disk for backup, Pan lens control, remote operation, alarm signal, motion detection,
VGA output(Selectable), etc.
Video input/output :bnc 4ch in/1 ch bnc out
Compression method:h.264
Real time recording support :120fps for ntsc at cif image(100 fps for pal)
Preview resolution:704x574(pal), 720x480(ntsc);playback resolution :4xcif
1 sata hard disk interface(support 2tb in total)
Backup:usb2.0, and network
1rj-45 ethernet connector, static, dynamic ip and ddns, support internet explorer and special client software
Multiple recording /search categoriers:date/time, event, manual, schedule, motion detection
Support 3g mobile phone.
1xusb mouse, 1xir controller
(w*d*h) 220 x 210 x 44 mm g.W: 2kg
(w*d*h) 220 x 210 x 44 mm g.W: 2kg
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Bidirectional Talk : Support
Record & Playback : Recording Mode : Manual> >Dynamic Detection>Timing
Playback : One channel or multi-channel playback
Search Mode : Time/Date ,Motion Detection & exact search(accurate to second)
Storage &
Backup : Space Occupation : Audio28.8MB/H Video25450MB/H
Video storage : Hard disk, , and net
Backup Mode : Network, mobile Hard disk and USB
Interface : Video Input : 8channel, BNC, 1.0Vp-p,75
Video Output : 1 channel, BNC, 1.0Vp-p,75 and 1 VGA output
Audio Input : 8 channel audio
Audio Output : 1 channel ,RCA, 200-3000mV,5K
Net Interface : RJ-45 (10M/100M)
PTZ Control : 1 RS485
USB Interface : 2*USB
Hard Disk : 2 SATA ports (max 2048G)
Environmental : Power Supply : 12V/4A
Power Consumption : <10W(without hard disk)
Working Temperature : 0-55
Working Humidity : 10%90%
Atmosphere Pressure : 86kpa106kpa
Dimension : 300mm x 265mm x 57mm(W*D*H)
Weight : 2.5 kg.
H.264 dvr card
Specifications
Dvr cards modelKav4000bKav8000
Video input4 channels (real time)8 channels (real time)
Audio input4 channels (real time)8 channels (real time)
Display rate120fps(ntsc), 100fps(pal)240fps(ntsc), 200fps(pal)
Recording rate120fps(ntsc), 100fps(pal)240fps(ntsc), 200fps(pal)
Resolution320*240.352*288s\w 640*480
Compression formatH.264
Connector modelD-type: bd15*2D-type: bd15*2
Dimension187.30mm*1044.44mm187.30mm*1044.44mm
Hard wares requirements
Os:windows2000\xp
Cpu: pentium4 (2.6)(lowest)
Memory: ram 256mb (lowest)
Hardware: hdd 40gb (recommend)
Display card: vga, ati, 9000 32mb(lowest)
Direct x: 9.0(up grade)
Specifications
Support each engine with multi-card, a card for 8 channels, support pal\ ntsc, all channels can be work noninterference by each other at the same time.
Support compress current\preview current\fold year\month\day\hour\min\sec, text. And fold the pictures, mosaic also.
Support dynamic kavi picture pick-up
Support 8 channels recording compress all the time.
Provide the function of high -speed ball\middle speed ball\flat roof and alarm linkage.
Equipment with the hardware watchdog functions and simulates video output.
Provide full-scale hypo-exploiters bag function, it can be applied to the system development, e.G.; security surveillance\medical treatment\communication and bank etc.
Capture the dynamic picture to jpg static picture deposit set.
Kangtree(at)126(dot)com
•displaying is synchronized with recording
•USB2.0 flash disk backup
•compatible of ntsc/pal format
•4channel mini dvr with 7"lcd monito
•displaying &recording:120fps for pal, 100fps for ntsc
•support symbian, windows, blackberry, iphone, android system for mobile phone surveillance
•support chinese, english, french, spanish, russian, portuguese
•support VGA output
•USB mouse, remote controller, ptz control.
(1) High quality color video at 30/25 fps recording/playback quad mode
(2) Optional: NTSC and PAL system
(3) Recording mode: auto record, manual, schedule, motion detection
(4) Motion Detection: Area selection & sensitivity adjustment for each camera
(5) Recording frame rate: NTSC max. 30 fps (quad) PAL max. 25 fps (quad)
(6) USB:Optional
(7) With video loss alarm function
(8) Chinese/English menu switchable
(9) Remoter Control:Optional
Recording resolution NTSC: 320x112, 640x224
PAL: 320x136, 640x272
HDD Rack Fixed, supports up to 250GB HDD Removable.supports up to 250GB HDD
Recording Time NTSC: 155 hours with 120GB HDD @ 15fps
PAL: 194 hours with 120GB HDD @ 12fps
Recording Mode Auto-record, Motion Detection, Manual, Schedule
USB Optional
Power Adapter DC 12V/5A
Dimension (Lí-Wí-H) 200mm x 132mm x 80mm
Weight Gross weight:2.5kg ;
Net weight:0.97kg Gross weight:3.5kg ;
Net weight:1.9kg
Feature
Advanced RTOS; H.264 compression,Support D1;
Software upgrade via USB;
USB mouse control;
PTZ and network function;
Multi-language versions are selectable;
8008T 7 Inch Hidden TFT monitor (China Patent No. 200730174963.4);
Support mobile remote surveillance;
Support network center management system;
Applied in large surveillance area such as bank,supermarket, gas station, factory etc.
Specification
Model NO. SKY-8004TP
Operation System Embedded Linux
Compression H.264
Video Input/Output 4 channel BNC input/2 channel BNC output
Audio Input/Output 4 channel BNC input/1 channel BNC output
Display Frame Rate NTSC: 120 fps (4x30 fps)
PAL: 100 fps (4x25 fps)
Record Frame Rate NTSC: 120 fps (4x30 fps) CIF
PAL: 100 fps (4x25 fps) CIF
Record Mode Manual¼pSchedule¼pMotion Detection
Image Quality CIF/HD1/D1 selectable
Record Resolution NTSC:352x240(CIF) 704x240(HD1) 704x480(D1)
PAL:352x288(CIF) 704x288(HD1) 704x576(D1)
Playing Mode 1 channel or 4 channel
Searching Mode By time/By event/By channel
HDD Support 1TB SATA HDD
Alarm Input/Output 4 channel input/1 channel output
Internet IE/PPPoE/DDNS
Remote Control Yes
Mouse Control USB
USB Port USB 2.0
PTZ Control Yes
Language Support Simplified Chinese,English
VGA Output No
Software Upgrade USB
7 Inch Hidden TFT monitor Yes
Mobile Surveillance Support Symbian s60 v3.0 , Mobile Pocket PC operation system
Remote Power Supply DC 12V remote power supply
Power Supply 19V/3.42A DC
Working Temperature -10f¦ ~ +50f¦
Working Humidity 10%~90%
G.W/N.W 6.1KG/4.5KG
Meas(L*W*H) 330 x 360 x 60mm.
Feature
Advanced RTOS; H.264 compression;
Software upgrade via USB;
USB mouse control;
PTZ and network function;
Multi-language versions are selectable;
Support mobile remote surveillance;
Support network center management system;
Applied in large surveillance area such as bank,supermarket, gas station, factory etc.
Specification
Model NO. SKY-8008 SKY-8008V
Operation System Embedded Linux
Compression H.264
Video Input/Output 8 channel BNC input/2 channel BNC output
Audio Input/Output 8 channel BNC input/1 channel BNC output
Display Frame Rate NTSC: 240 fps (8x30 fps)
PAL: 200 fps (8x25 fps)
Record Frame Rate NTSC: 240 fps (8x30 fps) CIF
PAL: 200 fps (8x25 fps) CIF
Record Mode Manual¼pSchedule¼pMotion Detection
Image Quality CIF
Record Resolution NTSC:352x240(CIF)
PAL:352x288(CIF)
Playing Mode 1 channel
Searching Mode By time/By event/By channel
HDD Support 1TB SATA HDD
Alarm Input/Output 8 channel input/1 channel output
Internet IE/PPPoE/DDNS
Remote Control Yes
Mouse Control USB
USB Port USB 2.0
PTZ Control Yes
Language Support Simplified Chinese,English
VGA Output No Yes
Software Upgrade USB
Mobile Surveillance Support Symbian s60 v3.0 , Mobile Pocket PC operation system
Power Supply 19V/2.5A DC
Working Temperature -10f¦ ~ +50f¦
Working Humidity 10%~90%
G.W/N.W 3.5KG/2.1KG
Meas(L*W*H) 330 x 230 x 60mm.
H.264 ahrdware compression 8ch dvr card
Video specificationsencoder real time h.264 base profile (mpeg4 part 10) supports constant bit rate (cbr) and variable bit rate (vbr) support up to 32 channels encoding at the same time on one pcresolution cif compression:up to 352x240 (ntsc), 352x288 (pal) video bit rate: 60kbit/sec to 2mbit/sec (variable bit rate) 384kbit/sec to 2mbit/sec (constant bit rate) frame rate: 30 fps per channel (ntsc), 25 fps per channel (pal) real time preview, recording and playback setup: setup all parameters while encoding
Features:
1. Pure two-stream H.264 compression,stream up to 35%lower than traditional DVR
2. Full real time record
3. Support various types of mobile monitoring(iPhone, Windows Mobile, BlackBerry, Symbian, Android)
4. Support VGA & TV output synchronously
5. 2pcs SATA, up to 2TB,support SATA DVD-RW
6. 2pcs USB2.0, Achieve to USB mouse, backup, and upgrading operations stably
7. Similar to the WINDOWS operating style, the powerful function of right of mouse menu 8. Powerful web(DHCP,PPPOE,DDNS,IP authority,IP search,Alarm center),perfect matching(WEB,client viewer,SDK)
9. Perfect protection circuit, the unique triple watchdog function, ensure that the equipment never crash
10. Unique black box technology to monitor the equipment, greatly reduce maintenance costs
11. 11 country language (Chinese/English, French, German, Italian, Polish, Portuguese, Russian, Spanish, Turkish, Arab).
12. To break the national boundaries, language can be customized according to customer requirements and achieve a perfect OEM, ODM.
13. Packing accessories: remote control, mouse, CD, manual, power supply, screw.
Video standard: PAL (625 lines, 50f /s); NTSC(525 line, 60f / s)
Display PAL: D1 (704 x576) ; NTSC:D1(704 x 480)
Playback: PAL: CIF(352 x 288),D1(704 x576)
NTSC: CIF(352 x 240) ,D1(704 x480)
Frame rate: PAL:100fps;NTSC:120fps PAL:200fps;NTSC:240fps
Audio: G711A
TB: Support
Record model: Manual >alarm >motion detection >timer
Playback: 1ch,multi-ch
Search: time, log list, event, Channel
HDD/Space: Audio: 28.8M / h + Video: 25 ~450M / h
Storage HDD, WEB
Backup model: WEB, USB, DVD -RW
Video input: 4BNC 8ch BNC
Video output: 1ch BNC, 1ch VGA output
Audio input: 4CH RCA 8Ch RCA
Audio output: 1ch RCA
WEB: RJ45 10M/100/1000M Ethernet
PTZ: 1 RS485
USB: 2 USB
HDD: 2 SATA, 2000G*2.
High resolution H.264,SD card Max.32GB * 2pcs,Compact size and easy installation
Operating language: Chinese/ English
Operation contact surface: Present in figures and diagrams menu operation contact surface(OSD menu)
Cryptosecurity:After the manager password management(manager establishes),user cannot change content.
Video input:4ch video input 1.0V,p-p,75Ohm
Video output:1ch output 1.0V,p-p,75Ohm
Video frequency demonstration:Single picture/four picture demonstration
Video frequency standard: PAL service pattern:25/seconds,CCIR625 TVL,50 field; NTSC service pattern:30/seconds,CCIR525 TVL,60field
Audio infut:4ch audio frequency inputs
Image compression:H.264,Invariable symbol stream(VBR)
Image form:CIF/HD1/D1 may choose
Audio frequency class standard:ADPCM
Date Storage:8kb/s
Serial interface:Supports 1 RS232 connection,refers to the DB44standard;Supports 1 RS485 connection,refers to the DB44stsndard.
* H.264 compression & network transmission
* SOC single chip, high stability
* Linux operating system
* Full-D1 live monitoring, each or quad display
* 800/960FPS CIF reall-time recording & 16ch playback picture quality
* Audio recording available
* Motion detection recording
* Motion detection: settable area & sensitivity
* Configurable record picture quality & frame rate
* Network: IE based monitoring
* Built-in USB2.0 port for video backup to computer
* 3G mobile phone remote viewing support iPhone / Symbian / Windows Mobile / Android systems etc.
Specification :
Video Compression : H.264
Video Input / Output : 24ch /32ch BNC inputs / 2ch BNC output
Audio Input / Output : 8ch RCA inputs / 1ch RCA output
Display Resolution : PAL: 704x576 / NTSC: 704x480
Display Mode : Each / Quad / Auto-switch / PIP
Display Frame : PAL: 800FPS / NTSC: 960FPS
Recording Resolution : PAL: 352 x 288 / NTSC: 352 x 240
Recording Frame Rate : 24ch: PAL: 600FPS / NTSC: 720FPS / 32ch :PAL: 800FPS / NTSC: 960FPS
Recording Modes : Manual / Alarm / Motion Detection / Time schedule
Recording Quality : Law / Normal / High
HDD Interface : support 2x HDD, SATA interface
HDD Space Support : 80G,160G,200G,250G,300G,400G,500G,750G, 1000G, 2000G etc.
Net Work RJ45 10/100M, TCP/IP.
USB Interface : USB 2.0 (Support Mouse operation / Data backup / CD/DVR writter etc.)
PTZ : RS485
Alarm : 8ch alarm inputs / 1ch output
Power Supply : DC +12V (power adapter included).
Video System PAL/NTSC
Video Compression Format Main Profile H.264
Video Input 8 Channels BNC(video signal 1Vp-p 75Ñ+)
Video Output 2 Channels BNC(video signal 1Vp-p 75Ñ+)
VGA Output : No
Audio Input 1 Channel RCA
Audio Output 1 Channel RCA
Multiplex Operation Live display,Playback,Recording,Backup,Network simultaneously
Display Mode 1\4\9
Display Resolution PAL:D1(704í+576) NTSC:D1(704í+480)
Display Frame. Rate PAL:25fps NTSC:30fps
Recording Resolution PAL:CIF(352í+288)
NSTC:CIF(352í+240)
Recording Frame. Rate PAL:200fps@CIF
NSTC:240fps@CIF
Recording Mode Manual,Timer,Motion Detection,Alarm,Remote
Recording Quality Options Best ,High,Normaland Basic
Pre-alarm Recording YES (15sec.)
HDD Tpye one SATA HDD
HDD Storage Supports maximum HDD capacity to 1TB
Recording Rearch Time,Motion,Alarm Mode
Recording Backup USB Flash Drive,Moved Hard Disk,USB Writer,Network
Media Play Software Windows Media Play
Network Transfer Format H.264
Ethernet 10/100 Base-T
Network protocol TCP/IP,DHCP,PPPoE,DDNS
Network Surveillance Supports Softwareí¦Video Viewerí¦ ,IE browser,Mobile Phone
Network Alarm Notification Email and FTP Server
IR Remote Control YES
Multiplex Languages OSD YES
Motion Detection Area 16í+12 grids per channel
Motion Detection Sensitivity 4 adjustable parameters for accurate detection
PTZ Control RS485,Pelco-D,Pelco-p
External Alarm 8 input and 1 output
Video Loss Alarm YES
Video Adjustable Hue\Color\Contrast\Brightness
System Recovery System auto recovery after power failure
Power Source DC 19V/3A
Operating Temprature 0¿¼C~50¿¼C
Dimenssions(mm) 354(W)í+230(D)í+45(H)
Package: Standard color box + master carton
Weight : 4.2 Kg
Feature
Advanced RTOS; H.264 compression,Support D1;
Software upgrade via USB;
USB mouse control;
PTZ and network function;
Multi-language versions are selectable;
8008T 7 Inch Fixed TFT monitor (China Patent No. 200830253596.1);
Support mobile remote surveillance;
Support 2 channel digital wireless camera;
Support network center management system;
Applied in large surveillance area such as bank,supermarket, gas station, factory etc.
Specification
Model NO. SKY-W8004AP
Operation System Embedded Linux
Compression H.264
Video Input/Output 4 channel BNC input/2 channel BNC output
Audio Input/Output 4 channel BNC input/1 channel BNC output
Display Frame Rate NTSC: 120 fps (4x30 fps)
PAL: 100 fps (4x25 fps)
Record Frame Rate NTSC: 120 fps (4x30 fps) CIF
PAL: 100 fps (4x25 fps) CIF
Record Mode Manual¼pSchedule¼pMotion Detection
Image Quality CIF/HD1/D1 selectable
Record Resolution NTSC:352x240(CIF) 704x240(HD1) 704x480(D1)
PAL:352x288(CIF) 704x288(HD1) 704x576(D1)
Playing Mode 1 channel or 4 channel
Searching Mode By time/By event/By channel
HDD Support 1TB SATA HDD
Alarm Input/Output 4 channel input/1 channel output
Internet IE/PPPoE/DDNS
Remote Control Yes
Mouse Control USB
USB Port USB 2.0
PTZ Control Yes
Language Support Simplified Chinese,English
Software Upgrade USB
7 Inch Fixed TFT monitor Yes
Digital Wireless Camera 2 channel
Mobile Surveillance Support Symbian s60 v3.0 , Mobile Pocket PC operation system
Remote Power Supply DC 12V remote power supply
Power Supply 19V/3.42A DC
Working Temperature -10f¦ ~ +50f¦
Working Humidity 10%~90%
G.W/N.W 5.0KG/3.2KG
Meas(L*W*H) 200x130x230mm .
Dual display operation for live monitoring and playback on two monitors
OSD & LOGO adjust position freely
Support IP server and IP camera connect through network
Instant playback in the current priview window
Control PTZ in the current priview window use mouse or keyboard
Recording & Storage:
Adopts the most advanced H.264 compression technology
Every channel can setup the recording mode, such as: consecutive recording, motion recording, sensor recording etc. and can setup recording by scheme
Supports not only variable bit rate but also variable frame rate
The quality and continuity of every image when recording can be adjusted freely
It supports multi-hard disk circular recording, so one need not change disk by hand
PlayBack:
Playback and record can run at the same time and there without mutual effect
System can playback in single partition or multi-partition
System can set precisely any hour, any minute and second to quickly index record data
System has several playing back paces: play back normally, single frame, quickly (2-5 time), slowly (1/2-1/5), freezing images and skipping to the set time
System support to playback part zoom realtimely
Support smart search
Control Function:
Control PTZ or speed demo through RS485
Control PTZ or speed demo use PC keyboard
Set preset position for each camera independently
Tour all preset position
Alarm Function:
Support 32 channels sensor input and 32 channels alarm output
Sound warning when alarming for each camera
Digital map popup when there have alarm
It has the long-distance transmission function of alarm signals through network
Send Email automatically when camera or sensor alarming
Network Function:
Support PSTNISDNADSLDDNLANInternet etc
Support Dynamic IP
It adopts advanced network compression technology
Support remotely connection of NVR,IE,PDA,NVMP through network
Authority management and system protection :
Locks keyboard and mouse preventing unauthorized access to the system
Locks keyboard and mouse preventing unauthorized access to the system
95 H 264 Standalone Dvr Ab H6004Al 6008Al 6016Al Suppliers
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