Venture Heated Clothing vest offers matchless comfort, gentle warmth and premium design. It's Heating Technology provides nothing less than optimum warmth and heat when it's cold without all the bulky layers. The tri-zone design provides heat right where you need it most. Heating Panels: Hair thin, micro alloy heating elements - No Coils Heating time is 1.5 to 4+ hours, depending on setting Battery: Rechargeable 602A with built-in 4 Temperature Controller (Good for 500 Charges) Heating temperature is up to 132 degrees Fahrenheit +/- 5 degrees Fahrenheit at 32 Fahrenheit Comes with a temperature controller with maximum, high, medium and low settings