Color：Black & White Dimension: W39cm×H38cm×D12cm Hand drop: 36cm Strap drop: 60〜95cm Outer: Polyurethane Speaker parts: Silicone Lining: Polyester and Polyurethane Zipper: Resin coil zipper Zipper pull: Zinc alloy 3 internal pockets, outer zippered pocket for hiding straps. Weight：819g Convertible backpack with our original speaker parts made by silicone, which looks like you can hear music from. Straps can be hidden in a zippered pocket on the backside, so you can use it as a tote bag too. It holds 13-inch laptop comfortably. Earphone shaped zipper pull is also our original product.