I have a Sangean radio which I mainly use for FM stations, but occasionally for listening the short-wave radio.
I have a USB headset but the radio has no USB port so how can I add one for listening?
Brad Longlands, ,

You don't need a USB port on the radio, you simply need an ordinary pair of headphones or earphones with a 3.5mm plug to go into the radio's headphone socket.
That USB headset only works on a PC because it can decode the data coming from the PC and turn it into audio. The radio already outputs audio.
Does that make sense?
Paul Zucker