Description: Product Name: winter warm heating vest Material: Polyester Fabric Color: black, blue Style: Nine zone fever vest Size: 55 * 40cm Gross weight: 600g Brand: balsam Applicable scenario: outdoor sports in winter, warm and cold proof Function: Nine zone heating, heating block is designed for the cool parts on the back of the neck, one key heating, three gear temperature control and intelligent heating; USB charging: convenient charging. You always connect 5v2a mobile power supply (this product does not include mobile power supply). Mobile power must be removed during washing; Safety and health: only 5V far infrared heating, far lower than the human body safety voltage of 36V. Stable heat and body safety voltage. Suitable for better warming the abdomen and waist; Large area heating: there are many built-in heaters in the electric heating vest, which has the functions of blood circulation and heat. It can not only warm your stomach, back, waist and abdomen, but also promote blood circulation; Wide applications: this heating vest is very suitable for outdoor skiing, winter fishing, mountain biking, biking, camping, snow hiking, hunting, outdoor existence, winter streets, daily offices, etc; Safe and light: the upgraded heating system ensures your comfort and warmth. Safety insulation of large area carbon fiber line heater. Comfortable and close to the skin, smooth touch and better warmth retention. This is possible to help you spend the whole winter easily without wearing heavy clothes in the cold Specifications: Intelligent heating, using graphene fiber heating, healthy heating, safety and security Long endurance, lasting heating It can be washed by water or machine, as new as ever. The power port is insulated and waterproof Preferred down cotton, comfortable fabric, warm and lightweight Anti drilling pile process, no fiber damage, no burr, not easy to crimp Package Included: 1 * heated vest