This VeloBoxLille app is the way to open and close your bike box. It serves as a virtual key once you have identified yourself during the first opening of the application with your username and password. When you are in front of the bike box in which you are registered, with your Smartphone connected to Bluetooth, an icon appears on your screen corresponding to the detected electronic lock. You have to press the icon and the electronic cylinder becomes active (it beeps and a halo of green light