The M12™ Cordless Heated Jacket utilizes multi layered fabric technology to actively warm the body and stimulate blood circulation. The jacket provides unmatched warmth and performance with a fleece inner liner and durable carbon fiber heating elements not only in the chest and upper back, but now in lower pockets that are controlled independent of the core heating elements to provide increased warmth to the hands. The 2340/2341 M12™ Heated Jacket features three heat settings, for varying heat needs and is water and wind resistant for a variety of cold job site conditions or outdoor sports and activities.Powered by M12™ RED LITHIUM battery technology for up to 6 hours of continuous heat on a single charge, the jackets join a system of over 40 tools. Hidden in a sleek back pocket, which can expand to hold an XC battery, an upgraded battery holder now includes a battery fuel gauge and a powered USB port for charging portable electronic devices. Available in sizes ranging from S - 3XL, battery sold separately.