【35% Heating Areas】The highest level of heating (red lights) starts as soon as long press the center button 3-5 seconds. WASOTO heated vest has 4 heating areas, 35% heating areas cover more, more comprehensive warmth. The heating elements generate heat at the collar, mid-back and underneath both pockets. With a maximum temperature of 158℉, giving you any warmth you need 【Innovative Power Button】No Worry About Lighting Embarrassment. The upgraded power button allows you to turn the lights ON/OFF during heating. In addition, you can also independently control the switch of the front and rear heating areas through buttons 【16000mAh Long-Lasting Battery】Built-in high-capacity power bank with fast charging capability. Up to 11 hours working time on a full charge. USB 9V and Type-C 9V output ports provide stable and fast charging for mobile devices. The input port supports PD3.0/PD2.0 protocols, supports faster battery recharge (Always turn off the power/disconnect the battery when not using the heated apparel) 【Polar Fleece Fabric & Two-Way Zipper】The polar fleece fabric at the collar and pockets provides ample warmth and comfort. Two-way zipper and hip elastic buckle ensure effortless dressing.The waist-cinching design perfectly reveals your curves 【Perfect for Daily Commute】Our heated vest keeps you warm when walking, watching favorite football and hockey games in the stands, or in the cold office. Unlike heated jacket, as a lightweight heating vest, you can easily wear it during outdoor sports such as cycling, golf, horse riding, skiing, camping, ice skating,etc. Wear it under the heated jacket or as a jacket. Meet your various matching needs