Do or did some of the new keyless entry systems actually rely on pin codes? Because if so, it would be very easy for someone to spy with binocs and steal the code.
This is talking about the technology that requires no input by the user. No pushing buttons, just a constant signal that normally requires the user to get close, like within a yard.
That is why they refer to it as hands-free. You can leave the device in your pocket and just open the door.