Winter Heated Vest: This electric heated vest warms easily in a fraction of the time with a wide heating area. Quickly warm up a wide area. The lining is made of aluminum for improved heat retention, and the vest achieves exceptional heat generating effect so you can enjoy your life in the middle of winter (Front and Rear Independent Control, 3 Level Temperature Adjustment) The stomach and back of the vest are independently operated by 2 switches, making it a great point for women who want to warm their stomach. You can adjust the temperature to 3 different settings according to your preference and usage scenes, and you can easily switch between strong (approx. 122°F / 55°C), medium (approx. 122°F / 50°C), low (approx. 104°F / 40°C). Equipped with a wake up IC so you can turn it on and off without having to remove the battery at any time USB Powered, Energy Saving: The electric heated vest has a USB outlet and a mobile battery is included. The compact size of about 6.3 oz (186 g), and can be easily stored in the storage pocket of the vest, making it easy to carry. Plus 10,000 mAh high capacity for up to 7 hours of continuous use. Wearing indoors can also save on heating bills. Continuous operating time based on our company's measurement: High (approx. 3.5 h), Medium (approx. 4.5 h), Low (approx. 7 h) (Ultra Lightweight and Easy to Clean) Made with high-quality lightweight material, the heater vest weighs approximately 12.8 oz (350 g), so you can wear it without stress. This item can be worn over a parka, as an inner layer of a jacket, or as an inner layer for a wide variety of outfits. Built-in USB connector with waterproof cover, can be machine washed after removing the battery, easy to clean Package Contents: Electric heated vest x 1, battery x 1 (output is 5 V, 2 A / approx. 6.3 oz (186 g), charging cable x 1, instruction manual x 1. It can be used for a wide range of occasions, from daily life such as walking, at home or in the office, to outdoor activities such as fishing, camping, climbing, cycling, etc