Accessories Introduction: 20-inch Exclusive Accessories: Front-opening design with multiple internal compartments USB port with built-in charging cable 24-inch Suitcase Accessories: Side carry handle Lightweight foot Expansion layer Common Accessories for All 2 Sizes: 3-stage telescopic handle Double 360° spinner wheels TSA-approved lock Top carry handle Explosion-proof zipper Internal divider compartments TSA COMBINATION LOCK 20-inch luggage combination lock Push the button (in the direction of the dial) to unlock the front opening and zipper compartment. Instructions for Reset the 3 Digit Secure TSA Lock--20 inch 1) With the lock in the original combination 0-0-0. 2) Press down the reset button [A] with a pen or other tool until you hear a 'click' sound. 3) Set your own combination by tumning the dials [B]. For example,8-8-8. 4) Push the button [C] in the direction of the arrow until you hear the'click'sound again,confirming that you have set your personal combination. Instructions for Reset the 3 Digit Secure TSA Lock--24 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.