Features:*1. 11 Heating Zones and 3 Temperature Adjustment: Carbon fiber heating elements generate heat across the waist, belly, and back, promote blood circulation and keep you warm. 3 heating temperature adjustment according to your needs. *2. USB Charging: Easy to charge. You need to always connect 5V 2A mobile power(this product does not include mobile power). The mobile power needs to be removed during washing. *3. Safe and Healthy: The 5V far infrared heating is far below the human body safety voltage. Large area carbon fiber wire heater is safe and insulated, ensure safe heating for you. *4. Skin-friendly and Comfortable: Soft and comfortable touch, premium fabrics, keep you warm in cold winter conditions without wearing thick clothes. *5. Wide Application: Suitable for outdoor skiing, winter fishing, cycling, camping, skating, or daily wear, etc. Description: *1. Size: M/L/XL/XXL/3XL/4XL*2. Material: Lining: PolyesterFabric: Nylon100% cotton*3. Temperature Adjustment:Warm: 55 (Red Light)Comfort: 45 (White Light)Energy Saving: 35 (Blue Light)Instructions:*1. Take out the USB plug.*2. Access to the mobile charging power source.*3. Press and hold the chest temperature control output switch for 3 seconds.*4. Long press the chest temperature control switch for 3 seconds, start to warm up and then adjust to the medium temperature heat when you need to always connect the mobile power.*5. Manual adjustment to the third gear,warm temperature of 45 degrees Celsius, comfortable gear temperature of 35 degrees Celsius, energy-saving gear temperature of 25 degrees Celsius.*6. Press and hold the chest temperature control switch for 3 seconds, and turn off the light to stop heating. Washing Tips: - Machine wash & hand wash are available. Do not wring or twists.- Unplug the powers before washing and make sure it is dried before heating.Package List: 1* Heated Jacket(not include power bank)