Combined two function of FM radio and earphone. Use earphone to listen to MP3 and PSP, you need battery support. It can also used as FM radio, you can listen to the FM, which the range is from 88Mhz to 108Mhz . You can turn the volume to a suitable place as you like.
With a shoulder strap, you just connect the buckle to the radio and PSP respectively, then the console can hang on chest. You can release the buckle and play games freely.