The fan has three levels of air volume, which can be adjusted up and down. You can adjust the direction of the wind through the blinds to suit your needs. The cool breeze is just for you .You can add ice water to the internal water container, then the fan will blow a cool breeze to moisturize the air, while reducing the temperature inside the door and reducing fatigue. The USB charging port can be charged by computer, mobile power and car. No need to worry about running out of battery. The cooling fan produces very low noise while working, which can provide you with a rest or a quiet and comfortable working environment. The water-cooled fan is small in size, easy to place on the table and the head of the bed, and takes up a small space. It is suitable for bedrooms, offices and cars. Specification: Material: ABS / PP / Electronic Components: 830g Battery voltage: 3.7V Battery capacity: 2000MAH Input Voltage / Current: DC5V / 1A Output power: 4W Fan running current: 240MA / Second gear 460mA / third gear 730mA Negative ion working voltage / current: 1W Product size: 190152x 160mmNote:Due to the different monitors and light effect, the actual color of the item may be slightly different from the color showed on the pictures.Thanks!Please allow 1-3cm measurement deviation due to manual measurement.