When you’re near your phone, it’s unlocked. When you leave, it locks itself. Automatically. You simply pair the SALT card with your phone through the SALT app. From that point on, SALT will unlock your phone when the SALT card is within 10 feet of it. You don’t have to enter your PIN or do anything aside from turn your screen on. If you leave to go to the bathroom or accidentally leave your phone somewhere, it will automatically lock itself until your card is back in range, keeping your phone safe.