USB Mini Air Cooler Air Purification And humidification Refrigeration Fan. Features: The easy way to cool any space, Evaporative Air Cooler is a personal, eco-friendly design that pulls warm air from,the room through its evaporative water filter to humidify while cooling.Compact, yet delivers 2x more cooling power. Personal space cooler lets you enjoy cool, clean at home or away Lightweight and portable for Indoor/outdoor use. Works via any USB power supply.It can be run by using a laptop, a power bank or a wall outlet. You just need to fill the tank with water and ice cube, then plug it into a power source and enjoy refreshing, cooling air. Precisely adjustable fan speed allows you to control the sound level as you wish. Product Description. Built-in water tank lasts up to 2 hours. Freon free, energy efficient eco-friendly. Adjustable 3-speed operatio, On/off switch. Product size: 122mmx99mmx169mm. Product net weight: 375g. Fan: high, medium and low wind speed. Water tank control: electronic control. Refrigeration area: 10 square meters. Refrigeration temperature: as low as 25 degrees Celsius. Water tank capacity: 180ml. Package Content: 1x Air Cooler,1xCharging Cable.