In car cctv cameras

[Diggers]

Once wired in, so long as there's a card in it, it just starts recording straight away. The motion detect thing in description doesn't do anything I'm aware of I've got it set to off and it just records on a constant loop 3mins at a time, once the cards full it just starts to re-write itself over and over, just means once you've had a incident you have to turn cam off to make sure it don't overwrite it, or carry a spare card and swap it out.

How many loops you get on A card?