USB Negative Ion Mini Air Conditioning Fan Office Dormitory Household Small Air Cooler

Description: 1. Quickly cool down cool while releasing a negative ion with one button. 2. Air purification air humidification quiet and low noise. 3. Portable design built-in 2000 mAh battery easy to carry. 4. 3-speed wind speed. Specification: Material: ABS/PP/PC electronic components Water tank capacity: 150ml Battery capacity: 2000 mAh (built-in) Charging time: 3 hours or so Motor speed: low 5V / mid-range 7V / high-end 9V Battery voltage / current: low 300mA / mid-range 540mA / high-end 720mA Negative ion working power: 1W Size: 120*127*132mm Weight: 470g Color: white pink blue