Dash cameras: good idea or paranoia

[Evan]

Does it turn on and record by itself or do you have to turn it on every time. Is it like our safety vision cameras where you would press it after the accident to save the last x minutes?

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its totally hands off, set and forget.
starts recording when the car turns on, turns off when the car turns off, and when the memory card fills up it records over old footage. it has a G sensor so if there is an impact it saves the last 3 minutes of footage into a read-only section of the memory card that cant be overwritten.