The trunk can be unlocked with the security control key. With a combination box lock, you have to re-lock the lock to remove the key, so your belongings are always protected. If the lock is opened, the red door open alert indicator will pop up, notifyingyou immediately when you arrive at the airport for pickup. EASY TO OPERATE: The flip and set buttons on the bottom make it easy to set a passcode. Instructions can be found on the back of the packaging. The high contrast of the white numerals on theblack wheels makes it easier to read. Equipped with advanced damping, each dial snaps into place for improved alignment accuracy. This is a user-friendly lockable luggage for all ages. Safe and secure Combination lock 3 digits allow you to set yourown combination, TSA locks made of high strength zinc alloy are strong enough to withstand the harshest luggage conditions. The slide to open feature is advanced and unique in the market. It is extremely resistant to technical and brute force unlocking.Flex Cable: The flex cable can pass through all standard sized zippers in suitcases, backpacks, duffels, briefcases and pelicans. Not only is it a TSA luggage lock for travel, it's also the perfect locker padlock for gyms, schools, drawers, toolboxes,cabinets, and more.Shipment Quantity: 1 piecePackage Contents: Only the above package content, other products are not included.Size: 32*87mm(Reminder: The size is measured by hand, please allow 1-2cm measurement error)Color: Silver(Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.)