Welcome to your application Radio Rottu Oberwallis RRO FM Schweiz, created mainly for anyone who likes to listen to music and entertainment. Our App allows you to listen to the radio live and free throughout the course of your daily life. Main functions of RRO - Radio Rottu Oberwallis App Schweiz Online: 1. You can listen to live music 24 hours a day (you only need to be connected to the internet). 2. You can know what artist is playing on the radio (you will see the full name of the artist).