"The ERAD platform will help you document every confiscated credit, debit and prepaid card, and instantaneously provide key card issuer information that’s critical to your investigation. And if some of those cards are prepaid cards, ERAD™ gives you the ability, right at the point of arrest, to determine the value and immediately secure or freeze those funds."

So these devices do let LEOs seize funds but only from prepaid cards, apparently, for now.