USB Charging Port: Travel Backpack with charging port offering a quick access to charge your phone and other electronic devices like Amazon Kindle devices, iPad, laptop and all other USB devices conveniently and freely.(Portable Battery pack is NOT INCLUDED)No specific battery pack is required. Add-A-Bag: Add-a-bag system convenient your travel. A luggage belt lets you pull your suitcase with one hand for easy travel. RFID PROTECTION Pocket: RFID protection pocket protects your personal information from being stolen(e.g. credit cards, passports, and driver's license) by a RFID scanner. Pre installed Jewel, Integrated mounting system for optional tag to find your bag instantly.