Note: This product does not include a power bank. This adjustable electric heating jacket has 7 carbon fiber heating elements that generate heat in the body's core areas (abdomen, waist, mid-back and nape). One button on the press allows you to adjust the 3 available heat settings (high, medium, low) according to your body's needs. When the heated jacket is working, the button light can be turned on/off at will, and the light off button set is set for all occasions in case customers don't need the light sometimes. Three temperature options: low temperature is about 38-45 degrees; medium temperature is about 45-55 degrees; high temperature is about 55-65 degrees. This machine washable heated jacket is waterproof, windproof and scratch resistant. Hardened brim protects against rain and snow.