Features: brand new and high quality Combination of heating and cooling: The electric scarf with temperature control technology provides cooling and heating modes, which is suitable for year-round use. The heating mode can adjust the temperature of the scarf between 40-50℃, and the cooling mode can operate at 15-25℃ lower than the ambient temperature. Flexible size: The neck size can be adjusted through the knob to meet various needs. Adopt ABS for shell and aluminum alloy heat sink, light and durable, no burden on the neck. Using IC for smart chip. When an overcurrent occurs, the power supply is automatically cut off and restarted to prevent malfunction. After the scarf cools down, you can use it again. 2600 mAh high-performance polymer lithium battery, safe battery life is about 2.5 hours. The LED display shows the temperature in real for time. Specifications: Material: ABS Weight: 230g Size: 17x14.7x4cm/6.69x5.78x1.57inch Color: Dark Blue/Pink/White Battery Capacity: 2600mAh Input Voltage: 5V/1.5A Rated Power: 4W Charging Time: 2.5 hours Package Includes: 1x Hanging Neck Fan note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.