The Sharper Image Backpack Speaker System (Black) Removeable Stereo Speaker with NXT Sound Technology Accessory Side Pockets Conventional Backpack with Compartments for Laptop and Folders iPod Pouch on Shoulder Strap with 3.5mm Headset Jack Conventional Backpack with Compartments for Laptop and Folders Accessory Side Pockets iPod Pouch on Shoulder Strap with 3.5mm Headset Jack Removeable Stereo Speaker with NXT Sound Technology