1.alto-falante 2. with USB charge 3. with mp3 player Main function and features for alto-falante 1, Support ... , With AUX IN, it can compatible with MP3, MP4, CD player and PC, etc.3, With FM radio function, frequency range: FM ... , With AUX IN, it can compatible with MP3, MP4, CD player and PC, etc.3, With FM radio function, frequency range: FM ...