How to use: 1.The Password Lock (modify password method) 2.The initial password is 000. 3.How to change the password for the first time: After turning the password wheel to the initial password number, hold down the unlock button and do not release it, then turn the password wheel to the password number you want to change, and release the button. Remember that the number in the password round is the changed password. Features: -External USB design, fast charging, release hands. -Featuring an ergonomic design, with adjustable strap to perfectly fit your body. -Multi-function shoulder bag /cross body chest bag, water repellent and scratch resistant. -Security anti-theft password lock, safer to go out. -Hidden card pockets on the shoulder strap, easy to place bus cards, etc. -Breathable and decompression carrying system, heat dissipation, ventilation, shock absorption. -Can be used messenger bag / shoulder bag / cross body backpack / casual day pack / sling bag / chest bag / travel bag. -USB Charging Sport Sling Anti-Theft Shoulder Bag is the best gift for friends, lovers, family members, easy to use! -External USB charging interface, you can charge your mobile phone, just put a power bank in your backpack. -Backpack security code lock, code 000 unlock, can prevent theft out of doors. -Backpack removable hook, easy to use and convenient. Specification Size: 32cm x 21cm x 9cm(12.6'' x 8.3'' x 3.5'') Package Includes: 1 * USB Charging Sport Sling Anti-Theft Shoulder Bag 1 * 3-in-1 Charging Cable