Warmer Waistcoat for Outdoor Hiking Running--- Durable, soft and warm, comfortable to wearFeatures: 1 minutes fast heat, dispel cold and keep you warm. Set the temperature you want to respond to a variety of environments. A button to heating, three stall temperature control, intelligent heating. It can be washed by machine and can be washed by hand. Do not wring it by hand. General USB interface power supply, longer service life, anti water splashing and washable. The fashion is warm, comfortable and breathable, and it's a good partner for your winter going out. Face beautification and body shaping: It activates various functions between skin and promotes metabolism. Body warming and blood circulation: It warms the human body, consumes excess heat, increases blood oxygen and fluidity. Vitality restoration: It provides deeper adjustment of physiological functions to avoid sub-health state and restore the vitality.Specification: Name: Warmer Waistcoat for Outdoor Hiking RunningGender: Women, Girl Material: Polyester Color: Black Size: M/L/XL/2XL/3XL Power supply interface: USB Power supply: 5V/2A Mobile powerot included Fever area: Back Warm: 45 (red light) Comfort: 35 (white light) Energy saving: 25 (blue light)Package Contents 1* VestPromiseIf the product has any quality problems, please feel free to contact us, we will help you solve the problem as quickly as possible.