size L ERGONOMICS ALL-AREA HEATING - The heated jackets for men has 8 carbon fiber zones heat up swiftly in seconds. The heating areas of the back, neck, abdomen, and arm with 3 buttons, and a total switch button to switch on/off all areas.GOTOBI heated jacket has built-in NTC temperature sensors in each heating area, which will regulate temperature evenly and prevent overheating. 18400MAH BATTERY PACK - The powerful battery offers 3.5-6-9 hours of warmth with a 6-hour fast recharge. The power bank backed by CE & FCC certification. LED display monitors power, USB port supports fast charging for smartphones,iPhone,iPad,earport. TEMPERATURE UP TO 149 - GOTOBI heated jacket adjustable in 3 heat modes: High: 149 (Red), Medium: 131 (White), Low: 113 (Blue)