Our first prototype unit was keypad/PIN solution. We quickly discovered that this was not the most secure way to lock away your devices. Our experience shows that PIN codes can be easily predicted, and seen from afar. We believe that a lock and key is the most secure solution, as well as the most hassle-free solution for our clients, and we are extremely proud of our proven security track record across our estate. With 20 million charges to date worldwide, this is something to shout about!