3s Rapid heating for long-lasting warmth] This stable heating scheme has been studied and developed for many years. Vinmori heated jacket can realize 3s rapid heating for long-lasting warmth, so that you can feel as warm outdoors as indoors. 🔥[Ultra long 10 hours endurance, perfect for working outdoors] Vinmori heated jacket adopts a better heating scheme which can keep heating for maximum 10 hours at a low level when connecting to our 10000mAh portable power source (battery not included). There are 3 levels of temperature for adjustment (red 149°F, blue 131°F, green 113°F). 🔥[Intelligent front and back independent control design] There are 2 control buttons respectively controlling the front and back heating areas of the heated jacket. You can adjust the heating areas based on the weather conditions. Its independent control design can also save the energy and increase the endurance of the heated clothing. 🔥[Advanced skin-friendly materials, with unique thermal insulation design of aluminum coating to retain warmth] Vinmori heated jacket is made from soft skin-friendly thermal insulation materials. The design of internal aluminum coating can effectively retain warmth and avoid heat dissipation. 🔥[Excellent decompressing thermal clothes] In addition to excellent thermal performance, this heated jacket can also promote blood circulation by keeping the waist, stomach, cervical spine and other positions warm. In this way, it helps you withstand the cold and relieve muscular tension in winter.