With high sensitivity, strong anti-interference, low background noise, and even lower distortion, listening on the Etón Field BT is a real pleasure. Plus, its wide/narrow bandwidth selection improves audio fidelity and minimizes noise. Listen out loud or plug in your favorite headphones. The Etón Field BT also has RDS for FM. RDS stands for Radio Data System and it enables FM broadcasters to deliver more than just an analog audio signal, but also to transmit digital data, like the station’s call letters, style of music, song title, artist and more.