Fit and Design: Features built-in heating panels that are made with ActionFlex material to provide lightweight warmth Touch-button LED with 3 different heat settings, Low, Medium, and High, provides easy on-shirt heat control ActionHeat 5-Volt 6000maH Power Bank powers garment or your phone, tablet, or any USB charged device Technology: Tri-Zone heating system includes 3 built-in heating panels, strategically placed on the chest and upper back FAR infrared heating and ActionWave heat reflective technology deliver hours of warmth and comfort ActionHeat battery-heated apparel utilizes innovative technology designed to warm the core body temperature Additional Details: Estimated Heating Times: High (Red): 150F – 2+ Hours Medium (White): 130F - 3+ Hours Low (Blue): 110F – 4.5+ Hours Material Contents: Heating panels made with ultra-fine carbon fiber An advanced heat-trapping insulated layer Water resistant material sheds rain and snow Includes: (1) ActionHeat 5V Heated Insulated Flannel Shirt (1) ActionHeat 5V Power Bank (6000mAh) (1) 24" USB Charging Cable How To Use: 1. Charge Up – Fully charge power banks with provided charger cable 2. Plug-In – Connect the power bank to USB plug located in the pocket 3. Turn On – Press and hold touch-button control on chest for 3 seconds and press touch-button to adjust temperature Machine Washable - Gentle Cycle Note: Heating times will diminish if used to charge other devices Touch-Button Control Technology (3 settings) Battery Voltage: 5-Volt Heats up to 150F