Nushape portable power bank for the wrap devices. Per their website: The Nushape Power Bank provides portable power for your active lifestyle, and can be used while exercising, cooking or even on a brisk walk! The latest model of the Nushape Power Bank is the better way to power your wrap. This device is a much more user-friendly option preventing any potential headaches and offering a longer lifespan and performance between charges. Our power bank is an essential item for those who have a dynamic schedule, travel often or in transit.