The ActionHeat 5V Battery Heated 1/2 Zip Pullovers are revolutionary in the world of heated clothing. Using the patented 5V signal technology it allows for most 5V battery to be used with the ActionHeat garments. The ActionHeat heated 1/2 zip pullover shirt comes with a powerful ActionHeat 5V Power Bank 6000mAh. This power bank powers your garment and can also charge your phone tablet or any USB charged device. Note: Heating times will diminish if used to charge other devices. ActionHeat battery heated apparel utilizes innovative technology designed to warm the core body temperature. These revolutionary garments feature built-in heating panels and are made with ActionFlex material that provides lightweight warmth comfort and versatility. Estimated Heating Times: High (Red): 150F - 2+ Hours Medium (White): 130F - 3+ Hours Low (Blue): 110F - 4.5+ Hours. Includes: (1) ActionHeat 1/2 Zip Heated Pullover Shirt (1) ActionHeat 5V Power Bank (6000mAh) (1) USB Charging Kit