Features: [USB Powered]Powered by any portable 5V (low and safe voltage) charger, USB plug compatible with most power banks(not included) in the market. [Five Heating Zones]Built-in 5-piece heating tablets, back-1, waist-2, abdomen-2, it can help to warm the body, promote blood circulation, and relieve the discomfort of muscle. [3 Heating Settings]There are three temperature settings. According to your own need, it can be set as red light (65 ℃), blue light (50 ℃), white light (45 ℃). [Widely Applicable]Perfect for outdoor activities like snowmobile, motorcycling, mountain climbing, camping, hiking, skiing, Fishing, Hunting or office routine, and business use during fall and winter months. [Fashion]It can be matched with your coat comfortably and easily. Very helpful to resist the cold invade and keep the body warm.