★[9 heating zones]-The polyester heating element powered by a lithium battery creates and radiates heat for the back, abdomen, shoulders and waist. The front pocket has hand warmers. Compared with other old heated clothes, they only have 5 heating areas. Our new vest covers 9 heating zones, upgraded rapid heating technology, lightweight, flexible and safe to use. ★【3 heating levels】Three heating levels, 45℃/35℃/25℃ second rapid heating. You can adjust and select the heating method of the heating pad according to the indoor or outdoor temperature. ★[Heating up to 8 working hours] The certified 8000MAH battery heats up quickly in a few seconds. It can be used for up to 8-10 hours (low), 5-6 hours (medium), and 3 hours (high) on a single charge. The powerful rechargeable battery pack is designed with a universal USB port to charge smartphones and other mobile devices. ★[Safety heating film device]-Built-in heating protection module. An extra layer of protective glue is added to the wires of the heating film to prevent short circuits, not easy to break, and 100% safe to use. Convenient for various activities, it is an ideal gift for family, friends and employees. ★[2021 Upgraded Heated Vest] The heated vest acts as a personal radiator to keep the body warm at any time. It is designed for most people, such as workers in cold weather and others who engage in outdoor activities (such as skiing, biking, hiking, and other winter sports). Vests can promote healthy blood flow, increase muscle oxygen and nutrient flow, relieve pain, reduce recovery time and improve overall performance.