Features: Durable and wear-resistant, fashionable and lightweight, easy to clean, adjustable shoulder straps, large capacity and multiple layers.Dimensions: L 11.8"/W 5.9"/H 18.8".Bag capacity: 20L, moderate size and very light to carry.Structure: top handle shoulder strap, adjustable shoulder strap, external usb port, 2 large front zip pockets, 2 small interior pockets, 2 side pockets.Notice:Please let the new bag have a slight smell, hang it for a few days to eliminate the smell.This backpack itself has no power supply and needs to be connected to a mobile power supply to provide you with a more convenient charging method. The USB charging port provides only convenient charging access.