1, Built-in 10W,115dB speaker; 2,With remote control; 3,Support 12V power; 4,Support 2 external speakers. MP3 ... provide 8 sound,only the orders provide all sound.7. With 100-300m remote control8. Shell linked to a belt clip ... -on, easy to carry9. Built-in removable-1800MAH super-capacity lithium battery, can play for 15 hours or so10.Accessories: Remote control ...