Ultrasonic high frequency oscillation atomizes water into 1-5 micron ultra-fine particles. The water is then diffused into the air leaving you cool and hydrated, but not feeling wet. For an even cooler breeze, simply freeze the included polar packs and add one to the water tank. Sterilize your air by using the anion function, which utilizes a pulse and a high oscillation circuit to produce corona and oxygen molecules. If using indoors, electronic thermal sensors detect the temperature and display it for easier use. When outdoors, use the mosquito repellent function to keep disease carrying pests away. Connect your device to the fan via USB port or Bluetooth to enjoy music from the built-in speakers. Wheels on the unit make it simple to move. Remote control included. 51.5″ tall.