How to use Warm Vest1Open the pocket and connect the USB connection to the power bank2Press and hold the switch on the clothes for 3seconds to start heating. 3. Press the switch to change the temperature, three-speed temperature control4Press the switch on the clothes and hold it or unplug the charger to turn it off.(Battery Not Included) Heated Vest 7 heating zones and 3 temperature settings.The heated vest has 7 heating zones, The three temperature settings are: strong (red), 45 C / 113 ; medium (white), 35C/95; and low (blue), 25C/77can be heated quickly within 3 minutes. Fully intelligent temperature control, 5V ultra-low safety voltage. Electric Heated Vest High-quality materials. The heating component is made of imported carbon fiber.without any radiation, which is soft and comfortable, safe and environmentally friendly. The vest uses high quality 100% Polyester waterproof fabric, has the function of heating and cold resistance. Fashion vests can match any clothes. Hooded, zipper design, two pockets on each side. Winter Warm Heated Vest.Winter you really need this heated vest hot. It can promote blood circulation, improve your physique and relieve pain. Ideal for outdoor activities like hiking, skiing, fishing, hunting, or working in the office. Suitable for men and women, women, adults and the elderly. It is a perfect gift for family members and friends.