iBen Air Purifier clean and purify the air in your personal space, allowing you to breathe fresh, clean air. The Purifier is powered by USB meaning you can use it almost anywhere. It catches ultra-fine dust, carbon monoxide, cigarette smoke, exhaust fumes, formaldehyde, toluene, benzene, pollen, mold, viruses, allergens, germs, bacteria, pet dander, odors, and VOCs. Adjust the Amazing Air Purifier between two modes to serve your needs. Compact Mode: Purifies and circulates air. Extended Mode: Powerful electric fan provides a cool airflow. The Amazing Air Purifier comes with a 2.5 micron thick permanent electrostatic filter. To clean the filter, rinse with water then let it dry in a shaded area. It is recommended to change the filter once a year. How to use it: Simply plug in the adapter provided to any usb port on your computer or outlet, to stop simply unplug usb. To use it as a fan grasp the front and back of the air purifier and pull to expand. To change the filter simply pull the purifier apart to access.