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. Apple finding system for option: Harness the power of Apple's Find My Network Should your bag or backpack go missing, you can locate it quickly and easily using the Find My app. Just one of the ways we make it easy to detect missing items nearby.The Find My app will help you locate your luggage whenever it goes out of range with a message to your device whether you've left your bag on the train or left home without it. The network reports your missing bag's location back to you. Encrypted from end-to-end, no one else will know, not even Apple or Swissdigital Design. In addition to integrated Find My capability, this range includes an audible alarm up to 130dB you can activate remotely. Either to locate your bag or warms others off. For those times when an audible alert is not approprite, you can remotely trigger a flashing light behind the Swissdigital Design logo. Ideal for spotting your bag in dark.