Fit & Design: Features 3 built-in heating panels made with ActionFlex(TM) material, ultra-fine carbon fiber, that provides lightweight warmth, comfort, and versatility Advanced heat-trapping insulated layer Canvas exterior with rib-knit cuffs and waist to help keep out the cold 4 LED power indicators display power banks battery life Technology: FAR infrared heating and ActionWave heat reflective technology delivers hours of heat and comfort Powerful Tri-Zone heating system, includes 3 built-in heating panels, is strategically placed on the chest and upper back to warm your core body temperature Touch-Button Control Technology (3 settings) Water-repellent and wind-resistant material sheds rain and snow How to Use: Charge Up - Fully charge power banks with provided charger cable Plug-In - Connect the power bank to USB plug located in the pocket Turn On - Press and hold touch-button control on the chest for 3 seconds. Press touch-button to adjust the temperature Estimated Heating Times: High (Red): 150F - 2+ Hours Medium (White): 130F - 3+ Hours Low (Blue): 110F - 4.5+ Hours Includes: (1) ActionHeat 5V Heated Work Jacket (1) ActionHeat 5V Power Bank (6000mAh) (1) 24" USB Charging Cable Additional Details: Battery Voltage: 5-Volt Power System: 2 amp Heats up to 150F Machine Washable - Gentle Cycle Power bank powers your garment and can also charge your phone, tablet, or any USB charged device; but note, heating times will diminish if used to charge other devices