... 1,Connect Mp3 to play music 2,FM radio 3,Remote controller ,board key operation 4,AUX ... play MP3 format music automatically and intelligently .2, FM radio function(Built-in FM antenna).3, Clock, alarm ... function.4, Built-in rechargeable lithium battery(Circuit with Charge Management)(charging time:4-5 hours, working time ... Several sound efforts for choice. Portable Mp3 music player with FM radio