Features: · 100% Brand new · Material: PU leather · Size: Length 50cm x Height 30cm x 11 cm · Function: Shoulder bag,Student bag,Travel bag · 1 style available · Occasion: Outdoor, party, work, school, travel · Weight: 0.7 kg Notes: 1: 1 inch = 2.54 cm, 1cm = 0.39 inch 2. Please allow 1-2cm (0.4-0.8") differences due to manual measurement, thanks. 3. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. 4. Because it is not the same production batch, logo and zipper might be different. Note: External battery must be purchased seperate. If you want to use External USB Charge Function, you have to do as follows: 1. Buy a mobile power. 2. Connect your mobile power with the USB interface inside the backpack. 3. Connect your phone with the USB interface outside the backpack. 4. Charging begins. There are 2 kinds of mobile power in the market. 1: Plug in your phone, you can start charging. 2: Plug in your phone also needs to press button of mobile power then start charging. To cope with this backpack, we suggest purchase of the first mobile power. Package Includes: 1 X Backpack 1 X USB Cable