15 Million Negative Ions - Ionizer creates 15 million negative ions that clear the air of airborne allergens such as pollen, mold spores, bacteria and viruses. They also clear the air of dust, pet dander and cigarette smoke. No filter needed!UV Sterilization - Powerful Eco-friendly UVC LED technology kills 99.9% of viruses, odor causing bacteria, certain molds and other allergens. Mercury and Ozone free!PM2.5 Real-Time Monitoring - LED air quality indicator gives you real time monitoring of the surrounding PM2.5 air quality up to 50 square feet!Purify Anywhere - Portable design with up to 4 hour battery life gives you quality air at your desk, in the house, car, RV, hotel, or anywhere on the go! Cup holder attachment allows for ease of use in a car. Switch to silent mode with the touch of a button to quietly purify the air next to you or your little ones while you sleep.