Features:1. Adopted bamboo charcoal fiber heating material, which is heat-resistance, wear resistance and can warm up rapidly.2. Soft and warm inner fabric offers you great comfort.3. Three gears temperature control, red led for high gear, white led for middle gear, Blue led for low gear.4. You can use your own power bank to charge the vest. (NOTE: power bank is not included).The USB plug is compatible with most power bank in the market.5. This vest will start heating in seconds when powered on. its widely compatible for outdoor skiing, winter fishing, mountain motorcycle, bicycle, camping, snow hiking, hunting, outdoor attendance, winter street, office daily, etc that meets all your needs.Specifications:Condition: 100% Brand New and High QualityColor: BlackSize: M, L, XL, XXL, 3XL, 4XL (Follow the size chart to select please)Material: Neoprene+VelvetGender: Adults UnisexInput Voltage: 5V5 Heated Area: Waist/Back/Belly3 Modes Temperature: Warm: 65 (Red Light), Comfort: 55 (White Light), Energy Saving: 45 (Blue Light)How To Use:1. Take out USB plug.2. Plug in power bank.3. Switch on the power bank.4. Press the chest temperature control switch for 3 second.5. Red light flashing, means high-temperature heating automatic.6. Manual adjustment three level temperature.7. Press the chest temperature control switch for two second, lights out and stop heating.Washing Instructions:1. Take out the power bank.2. Do not force knead or beat.3. After nature air drying can be use.4. Machine wash & hand wash are available, make sure it is dried before heating.Package Included:1 x Electric Heated Vest (Power Bank is Not Included)Note:1. Please allow 1-2cm measuring deviation due to manual measurement.2. Due to the different monitor and light effect, the actual color of the item might be slight different from the color shown on the pictures.3. Batteries, connecting plugs and chargers should aviod contact with water during operation. It should be used in completely dry condition.4. Please DO NOT disassemble, modify the heating film and control circuit, to prevent man-made damage to hot components.5. The cable is waterproof, can be washed.6. Always connect it to the power bank when heating.7. Power bank is not included in the product.