UNISEX functional backpack includes USB on the side for connecting a portable battery (not included) Material: Oxford cloth Weight: 0.55 kg Laptop size: 15\"/15.6\"/ 16\" - 45×30×22 cm Compartment: 4 Capacity: 20-35L Use: Business, College, Work, Travel Opening Method: Zipper Style: Business Travel Handle Strap Type: Soft Handle Feature: Multipurpose, High Quality Waterproof Wear Resistant Shock Resistant Light Weight Reduction Fashionable Appearance