The ActionHeat 5V Battery Heated Vests 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 Jackets and Vests. The ActionHeat Vest comes with a super 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. ActionHeat heated garments use FAR infrared heating and ActionWave heat reflective technology to deliver hours of heat and comfort. ActionHeat allows you to stay warm and enjoy outdoor winter activities longer than ever before. HOW TO USE: Charge Up – Fully charge power banks with provided charger kit. Plug-In – Connect the power bank to the USB plug located in the pocket. Turn On – Press and hold the touch-button control on the chest for 3 seconds. Press the touch-button to adjust the temperature. Features: Machine Washable - Gentle Cycle The powerful Tri-Zone heating system includes 3 built-in heating panels, strategically placed on the chest and upper back to warm your core body temperature. Touch-Button Control Technology (3 settings) 4 LED power indicators display the power bank's battery life. 2 zippered pockets plus a hidden battery pocket Cinch bungees for a comfortable fit. Battery Voltage: 5-Volt Power System: 2 amp Colors Available: Black, Navy, Sharkskin Grey Sizes Available: Men's: S-XL Women's XS-XXL Material Contents: Fabric: 94% polyester. 6% spandex. Breathable fleece lined soft shell. Water-resistant softshell sheds rain and snow. Advanced heat-trapping insulation layer. Ultra-fine metal fiber heating panels