Mfinesun 17-inch Black Wheeled Backpack features a streamlined design that combines versatility with practicality. It includes silent wheels, an extendable aluminum alloy handle, a built-in padded laptop compartment, dedicated accessory pockets, dual side water bottle pockets, and elastic straps for securing clothing, all within a lightweight construction. Password Lock User Guide: Default password is “000”. Password Change Procedure: Push the switch to the right to keep the lock in the open position. Adjust the numeric code, then release the switch to successfully change the password. Opening Procedure: Enter the correct password, push the switch to the right, and the zipper will pop out. Locking Procedure: Enter the correct password, insert the zipper, and adjust the code. Attention! The switch is not activated by pressing down—it must be pushed to the right!