The ActionHeat 5V Battery Heated Half-Zip Pullover Long-Sleeve Shirt for Men features hidden heat panels to keep you warm and comfortable when the mercury drops. This ActionHeat heated shirt has 3 built-in heating panels that are strategically placed on the chest and upper back to warm your body's core temperature, while a touch LED button provides easy control of 3 heat-intensity settings. This men's pullover uses FAR infrared heating and ActionWave reflective technology to deliver hours of heat and comfort. The system boasts a 5V, 6,000mAh rechargeable power bank that powers the heating panels and can also be used to simultaneously charge your phone, tablet, or any USB device. The ActionHeat 5V Battery Heated Half-Zip Long-Sleeve Pullover for Men is built with ActionFlex that offers free and easy mobility and has a half-zip design that uses a durable YKK zipper. 4 LED indicators let you see the power bank's charge level at a glance. 91% polyester/9% spandex and ultra-fine carbon fiber heating panels. Includes a power bank and USB charging kit. Estimated Heating: High (Red): 150F for 2+ hours; Medium (White): 130F for 3+ hours; Low (Blue): 110F for 4.5+ hours. Charging time: 46 hours. Machine wash. Imported.Manufacturer style #: AH-ZTOP-5V. 91% polyester/9% spandex Can be worn as an outer layer or base layer under vest or jacket Tri-Zone heating with 3 built-in panels Touch-button control with 3 heat settings Half-zip design with a durable YKK zipper Powerful, rechargeable 5V power bank USB port allows you to charge compatible devices Provides battery-powered warmth for up to 4.5+ hours (on low) Includes shirt, power bank, and USB charging kit