Expandable Capacity Designed with a 6cm expandable side panel, allowing you to increase storage space as needed, perfect for business trips or daily use Laptop Compatible Designed to fit 15-17 inch laptops, with dedicated compartments for your computer and tablet Water-Resistant Design Keeps your belongings safe from light rain and splashes, ideal for various weather conditions Password Lock Security Includes a built-in password lock for added privacy and peace of mind during your travels External USB Charging Port Stay connected on the go with the convenient external USB charging port, which allows you to easily charge your devices without needing to open the bag Luggage Strap for Easy Travel Designed with a rear luggage strap, this backpack can be easily attached to your suitcase handle, making it an ideal companion for business trips Specifications: Product material: ABS+PC+polyester Product size: 47*31*10cm Product function: single shoulder, double shoulder, hand-held Product weight: 1400g Overall structure: main compartment, zipper pocket, ID pocket*2, laptop compartment, tablet compartment