A car theft ring sophisticated enough to solder is going to realize several things: 1) Flipper Zero = almost no effort and instant. 2) Cheap and plentiful USB

A car theft ring sophisticated enough to solder is going to realize several things: 1) Flipper Zero = almost no effort and instant. 2) Cheap and plentiful USB SDR = slightly more effort, longer range, higher signal integrity, faster, works with anything that can do host USB. 3) Using a headphone jack and requiring some amount of electronics expertise for what is in the end going to be a very short range and cumbersome tool that requires a 3.5mm jack that isn't even present on many/most modern devices is practically a non-starter. This is basically a sales and marketing video for car theft rings.