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The Z3 Plus has a parking mode which can be enabled manually if you want to put your vehicle into surveillance mode.
At 1440 pixels with a 128GB SD card in the camera, the 16:9 ratio video recording time will be about 10 hours. The road trip setting allows you to set the loop recording to loop after one, three or five minutes.
The Z3 Plus has a 180mAh internal battery for surveillance recording when the ignition is off. If any motion is detected, the camera will switch on and start recording.
If you want to protect a part of the journey and prevent it from being overridden, press the "video protect" button on the Z3 plus. A warning icon will indicate that the video has been protected.
To capture a single image, press the "Mode Switch" button, then the OK button. Image resolution on the Z3 Plus can be set to capture images at 4, 8, 14, or 16 MP resolution.
There is a 19.6-ft. cable to connect the rear camera to the front. This camera has a 2.4-inch scratch resistant super HD LCD screen with 1920 x 1080 pixel resolution and a 150-degree viewing angle on both cameras.
The front camera on the S3 also has Picture in Picture mode (PiP) -- but this is difficult to see both images clearly when driving.
However the display can be configured to display either the front screen or the rear screen across the whole display.
If the rear camera is disconnected then the front camera gives Wide Quad HD with 2560 x 1440 pixel resolution. Both cameras have a wide dynamic range to balance exposure and compensate for low light conditions.
The camera will record .MP4 videos on a loop, and supports an micro SD card with capacity of up to 128GB to record up to 12 hours with both cameras at 1080 pixels. It has a 470mAh battery for surveillance recording when the ignition is off and the camera detects motion.
The road trip setting allows you to set the loop recording to loop after one, two, three, or five minutes.
To protect a part of the journey and prevent it from being overridden, press the "Menu" button on the S3. A warning icon will show that the video has been protected.
A single image can also be captured by pressing the "Up" button, and then press the "Up" button again to capture the 12MP image.
Both cameras have a user guide, and quick start guide which are invaluable to configure the cameras in the car. The guide, written in German, Japanese, and English, enables you to configure different settings depending on your journey requirements.
If you make regular commutes, you can set the motion detection to on, the accelerometer to normal or high, the loop recording to any, and the screen to switch off automatically.
Audio recording can also be enabled on both camera models.
I found both cameras easy to install -- and the rear camera cable was long enough to easily reach the back of the station wagon window -- although the cable did require adjusting to ensure that I could open the rear window without pulling the cable out of the rear camera.
The controls were fairly easy to navigate to set up the recording loops for my preferred journey. Recordings played back on my PC showed that the image quality was excellent on both cameras -- even in low light. I found that the headlights of approaching cars did not flare across the screen, and that trees and other roadside objects were easily visible in low light.
I found it much easier to press the "video protect" button on the side of the Z3 Plus, than to remember to push the "Menu" button on the S3.
The Z3 Plus seemed more intuitive. However, I was testing both cameras at the same time in the car, and had to learn two sets of menus at the same time. I do not think that this would not be an issue with only one installed camera in the car.
For ease of use, the Z-Edge Z3 Plus gets my vote. it is simple to attach to the car and easy to operate manually. Its image and video quality means it certainly does its job well.
But, if you want to record everything that happens behind you -- for total peace of mind -- pay the extra $20 and get yourself an S3.