This is a backppack designed for the cyclists or scooter drivers. This backpak has a built in speaker system that plays your MP3/MP4

while you are cycling . The audio box is detachable so that if you want to remove it and place it anywhere so that you can listen to

your MP3/MP4 or Cd players . Backpacks comes with a patented design holder so that you can affixed it to the front of the bicycles

with ease . Current product is a hit seller for cyclists in Taiwan and USA . AA Batteries for the speaker module is needed but is not provided

with this sale . This backpack is a high quality product with airstripes system . The connector to your MP3/MP4 is a 3.5mm audio plug .

Size : ( HX WX D )  :   36X 30 X13 cm. With this backpack , now you can play your music aloud while cycling or jogging .