ADDheat? Inside closure ? 4 ZONE HEAT: You spoke, we listened. Our Traverse 2.0 version features 20% larger heating panels to boost your core body heat. Ultra thin carbon fiber heating targets your back, chest, and neck to keep you warm. ?? TEMPERATURE CONTROL: Take charge of your heated clothing with high, medium, and low settings. Change the heat setting of your jacket with a simple press of a button. ?? 10 HOUR RUNTIME: Includes our newest 7.4V 5200 mAh power kit with charger. Heat resistant and heated clothing safe. Operates up to 10 hours (low), 6 hours (med), 3 hours (high) ? PHONE CHARGING: Charge your phone and smart devices from our battery's USB port (output only). Press and hold on the battery button to activate a mini flashlight. ? MACHINE WASH: Washer and dryer safe. Includes zippered packing cube. Designed in USA. USA Support. 1 Year Warranty. Since 2003.