You sweep a card upon entering the place, and it detects you leaving and I don't know exactly how they know what you bought, but its something like that.
I personnally would be too afraid of the different ways you could abuse a system like that. The moment you know how the detecting algorithm works you can find ways to go around it.
I personnally would be too afraid of the different ways you could abuse a system like that. The moment you know how the detecting algorithm works you can find ways to go around it.