Feature: 1) Combined two functions of FM radio and earphone,use earphone to listen to PSP game music and no need battery support ,it can also receive the broadcasting,which the frequency range from 88MHz to 108MHz, the volume can be controlled as well 2) Auto shift function when listen to the FM broadcasting PSP console is no needing,and when plug it into PSP game for game the radio sound can be cut and shift to game sound automatically 3) With shoulder strap connect the buckle respectively to the PSP and radio then the console can hung on the chest front conveniontly. just to release the buckle to play games