and low noise: This air conditioners saves space and is economical. The for birthday school yourself, family and in the 6-hour timing function: humanized timing switches, the for time can be chosen as you like. This portable cooler features multi-speed fan speed adjustment for easy use. Portable Cooling Fan: This small air conditioners is usb powered and can be used in combination with adapters (not included), computers, car Multi-scene use: desk, living room, bedroom, kitchen, feel cool any for time, cooling air conditioners: In addition to the feeling superior to traditional fans, it also has the effect of filtering humidifying and cooling air.