Product Name: Business Backpack Size: 30x16x42cm Color: as picture shows Feature: High-density oxford material, waterproof and durable. External USB charging port with built-in charging cable is easily to charge your smart phone(only USB port, power bank not included). Can hold 15.6 inch laptop. Can expandable from 16cm to 23cm. Breathable, large capacity, anti-theft and mutifuctional interior compartment. Tie rod fixing strap suitable for suitcase. Note: Please allow 1-2cm differences due to manual measurements. There are slight color differences due to different screens and lights.