Powered by the m12 redlithium battery. Each heated hoodie uses carbon fiber heating elements to create and distribute heat to the chest and back. A single touch led controller heats up the battery heated hoodie to three heat settings. This milwaukee heated hoodie kit has a new quick-heat function that allows you to feel heat three times faster than our previous hoodies and market competitors. The hoodies are built with a durable cotton polyester exterior and waffle weave thermal lining. This provides a versatile three-season solution to keep heat trapped in without bulky additional layers. This kit comes with one heated hoodie an m12 battery and charger.