The funtion of Car DVR Recorder is Automatically begins recoding when vehicle is started.Here are two Dual camera one for your reference.
Dual Front & Rear Camera DVR GPS Data Recorder Car Vehicle Dash Dashboard 1.3M Dual cameras.

With this vehicle data recorder,Because the recording function.If something happens such as a lot of people crossing roads,ride a bicycle or motorcycle on the road ,if you touch them .You may probably be blackmail,if you have installed this machine ,you will aviod a troublesome case.The machine can provide the effective evidence and ensure your right.
If the car is installed driving recorder, the driver also dare not to Illegal driving. Accident rate could significantly descend. While vehicle occurred traffic accidents will be filmed by other vehicle’s recorder .Maybe as the popularity of recorder the Traffic accident and escape case will greatly decrease in the future.

The features of this machine
Integrated real-time GPS records location, support GPS Map.
one front view and one back-view, and the back one can rotate up to 20 degrees.140 degree front and 120 degrees rear facing wide angle lenses.
Split screen modes to view both cameras simultaneously.
Built in microphone & speaker
Support language: English/Russia/German/French/Spanish/Japanese/Chinese/Korean.
Package as below 1 * Car DVR 1 * Bracket 1 * Car Power Supply 1 * GPS antenna 1 * User Manual

Dual Lens HD Car DVR Dual cameras, equipped with different lens, they can rotate up to 180 degrees.
Left Camera: 120 degrees wide-angle lens, record whole scenes. Right Camera: Telescope lens, record scenes detail more clearly.
1)G- Sensor When the gravity acceleration reaches 6g (1g = 9.8m/sec^2), F20 will automatically keep the images before and after the impact interval as undeletable file to preserve the evidence.
2)SOS Emergency Button acts as the same as G-Sensor when pressed.
3)Each recorded file folder is automatically linked and merged to keep the integrity of images without losing any instant.
4)2.7” 16:9 HD display without distortion, both of the cameras can have 180∘rotation
5)H.264 image compression technique
6)Day/Night filming mode switch: Press a button to switch the day/night mode to solve the over exposure issue during night time. By night mode, the tag of front car can be
7)30fps or 60fps smooth images with no delay or blur.
8)Plug-‘n-Play HD PC CAMERA
9)Independent filming angle adjustment/rotation of the two cameras.
10)IR LED for nigh vision
11)Cyclic recording mode with no memory run out issue.
12)Motion detection
13)Automatic recording when the vehicle starts, charging while recording.
14)HDMI and TV out supported
15)Remote control supported

Specification:
Image sensor: CMOS WXGA HD sensor
Video resolution: 1280*480
Language: Traditional & simplified Chinese,English,Russian, Japanese, Korean
LCD display: 2.7″ 16:9 TFT
Memory: TF card up to 32GB (TF card not include)
Focus range: 12cm ~ ∞
Photo format: JPEG
Video format: MOV
Audio: Built in microphone and speaker
Interface: USB2.0, HDMI, AV
Battery: Built-in 3.7V/ 600mAh lithium battery
Package as below : F20 ,Manual ,Usb cable ,Remote control ,AV cable (white and yellow cable), HDMI Wire ,Suction Kit/Bracket ,Charger

The Install Method
1.Connect the Host and suction kit through car slot.(The suction kit connecting direction is on the side of the Host button control surfaces)
2.Host lens forward,fix the suction kit on the windscreen,push suction kit ,make sure the host has firmly sucked on the glass .(Note:to ensure host firmly on the glass ,pls clean and dry the glass )
3. Loosen Angle regulator,adjust the host parallel to the ground,then tighten. (Note: if the picture taken not reach your expected effect, you can adjust the host Angle repeatedly, until it satisfy your needs)
4.Install a SD memory card and connect the power cable. This product need power supply by the cigarette lighter.(Note: in order not to affect the driver view pls Bound the power cable through sunshading board to the side window
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