... Amplifier,and stereo FM radio (87.5—108MHZ)onto multimedia Products and much more convenient to use. (1)Support mp3 Audio playback(2 ... , bass, jazz, rock and popular),be invalid in FM mode. 8,PREV / VOL-,Previous one in FM mode, press the key to the last ... ,5,6,7,8,9,100+,(reduce frequency in FM mode), 200+( increase frequency in FM mode);numeric key, combined selection: for example ,if ...