Features:*1.Many Heating Zones and 3 TemperatureAdjustments:carbon fiber heatingelements generate heat across the waist, belly and upper back; One button for 3heating settings.*2.USB Charging: Easy to charge. You need to always connect 5V2A mobile power(this product does not include mobile power). The mobile power needs to beremoved during washing.*3.Safe and Healthy: Only 5V far infraredheating, far below the human body safety voltage 36V. Stable heat and bodysafety voltage. Suitable for better warming of the abdomen and waist area.*4.Large-area Heating: The electricheating vest has Many built-in heaters, which have a blood circulation andwarmth function, which not only warms your stomach, back, waist and abdomen,but also promotes blood circulation.*5.Wide range of applications: This heated vest is ideal for outdoor skiing,winter fishing, mountain biking, cycling, camping, snow hiking, hunting,outdoor attendance, winter street, daily office, etc.*6.Safe and lightweight: the upgraded heating system can ensure you to enjoycomfortable warmth. Large area carbon fiber wire heater is safe and insulated.Comfortable & skin-friendly, touching smoothly and warmth better. It canhelp you spend the whole winter easily without wearing big clothes in cold.(this product does not include mobile power)