The RZTX 24507A Smart Trolley Bag backpack is a versatile travel laptop bag with an expandable capacity of 40L to 60L, offering spacious compartments for efficient organization. Trolley bag features a vacuum compression system that saves up to 50% space, equivalent to a 24-inch suitcase, and includes a removable vacuum compartment for bulky items. Designed for durability, smart trolley bag is made from waterproof Oxford cloth with a 900D waterproof membrane, anti-theft pocket, wear-resistant wheels, and bottom foot seats for long-lasting performance. Laptop bag includes shockproof laptop compartments (fits up to 19” laptops), USB and Type-C charging ports, and two-way zippers for convenience. A built-in electronic scale with a mini-LCD screen helps monitor luggage weight in multiple units. Its 3-in-1 convertible design allows it to be used as a trolley bag, shoulder bag, or backpack, making it ideal for travel, business, or school. Sleek, durable, and functional, this smart trolley bag for travel is the perfect companion for modern travelers.