Features: 1. It has 15 heating zones: back, neck, shoulders, waist, and abdomen, providing all-rounded warm for your body. 2. Designed with 3 temperature modes for meeting your different needs. 3. USB charging. Connect the 5V 2A mobile power(not included). 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. Hand and machine wash. Do not wring. Disconnect and remove the power supply before wash and dry the vest before heating. 5. Thick lining provides strong breathable and warm performance, soft hand touch, warm and comfortable to wear, keeps you warm in cold winter conditions without wearing thick clothes. Description: 1. Size: M/L/XL/XXL/3XL/4XL/5XL 2. Material: Lining: Polyester Fabric: Nylon 100% 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. Connect 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, 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)