For the price I would highly recommend this DVR. It works great with Android head units, but I also set it up for a 24/7 security camera by unplugging it from the always-on USB socket when the Android device is off, even if you don't have a monitor in the car . You can turn it on and then pull out the memory card to view it on your computer. I am thinking of using a few more for this purpose - for example one hidden behind the grill feeds the under hood fuse box.
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