The ACTIONHEAT 5-Volt Battery Heated 1/2 Zip Pullovers are revolutionary in the world of heated clothing. Using the patented 5-Volt signal technology, it allows for most 5-Volt battery to be used with the ACTIONHEAT garments. The ACTIONHEAT heated 1/2 zip pullover shirt comes with a powerful ACTIONHEAT 5-Volt Power Bank 6000 mAh. 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 light-weight warmth, comfort and versatility. Size: Large. Color: Heather Blue. Gender: male. Age Group: adult.