... , alto,. High sound.3. It can be used with mobile phone, all device with 3.5mm4. Guitar style, can hang in the sitting ... . It has three different interface of the mobile phones and MP38. Have USB interface.9. 4 and 3.5mm interfaces.10. Speaker Size ... /pause: intermediate keys, USB drive or SD card reading mode for the play/pause.6. Charging mode: this machine uses the ...