Durable Material: Crafted from high-quality ABS, this 3-piece luggage set includes 20",24",and 28" suitcases that are lightweight .The matching luggage bag and toiletry bag are made of tightly crafted fabric, adding more convenience to your travel. 20 Carry on Luggage: The 20-inch carry-on is ideal for short trips, built-in USB port and data cable for charging devices on the go (power supply not included). And 20 inch suitcase is designed with a cup holder so you can carry your drink while navigating the airport or traveling. Accessories Introduction: USB port with built-in charging cable Cup holder Lightweight foot Expansion layer Common Accessories for All 3 Sizes: 3-stage telescopic handle Double 360° spinner wheels TSA-approved lock Top carry handle Explosion-proof zipper Internal divider compartments TSA COMBINATION LOCK The 20-inch security lock buckle button, when pushed towards the zipper side will open the suitcase zipper, and when pushed outward will open the front compartment automatically. Instructions for Reset the 3 Digit Secure TSA Lock--20 inch 1.Put the dials at its original numbers 0-0-0. 2.Press down the reset button with a tool. 3.Set your combination by turning the dials for example 8-8-8. 4.Push the button toward the dials, the reset button will bounce back, then done! If you want to open the front opening, push the button outwards. Instructions for Reset the 3 Digit Secure TSA Lock--24 & 28 inch 1. The initial password of lock is 0-0-0. 2.Press the reset hole with the tip of the pen. 3.Set the new 3-digit code while pressing. 4.Now you can open the lock with the new password.