To set an alarm, you can follow these steps:\n\n1. Activate the alarm: Press the corresponding button to activate the alarm mode.\n2. Set the hour and minute: Use the buttons to set the hour and minute. Short press changes the value gradually, while long press changes the value quickly.\n3. Activate the alarm: Confirm the settings to activate the alarm.\n\nSince I don't have any specific information about the product «Billy ()» from Mobility on Board, I recommend consulting the user manual for exact instructions.