CO.alition Colfax PHD Smart Backpack with Integrated Power Supply and 500GB Wireless Hard Drive Contoured, molded foam back panel and shoulder straps for the most comfortable carry you'll find in an urban pack High speed Pass-Thru charging charges both the integrated power supply AND your device at the same time from a single wall outlet cord Single wall outlet cord deploys out of a special external pocket so devices can be charged without accessing the interior of the pack Compatible with virtually any device that can be charged via USB Includes 500 GB Seagate Wireless Hard Drive for quick wireless access to all your files & media without an internet connection.