Quiet operation: The desktop air cooler cools quickly, is ultra-quiet, and runs quietly without disturbing your rest. 3-blade design: The portable air conditioner adopts a 3-blade design with simple button operation. USB powered: The USB air cooler has a built-in battery and is powered by a USB port, which has a long service life and is portable and mobile. and portable: The portable air conditioner is small in size, light in weight, and easy to carry, suitable for outdoor and indoor use, such as office, fishing, camping, etc. Holiday gift: The desktop air cooler is a perfect birthday and anniversary gift for friends, family and colleagues.