ororo Women's Black Long Battery Heated Down Jacket Imported Two core battery-heating warming zones on lower back& Back Battery NOT Included, please use external/portable batteryUSB Interfacehas 2A output Wind proof with Hooded, women's Slim-Fit Cutting Style Temp.Range:30-50(Surface temp) Lasting time: 4 hours for 10000 mAh external battery Size S=Asian Tag Size M; Size M=Asian Tag Size L; Size L=Asian Tag Size XL