KINGSO USB Auto Fresh Ionic Air Purifier Ozone Oxygen Bar Anion Ionizer Office Home Car This ionizer is a USB-powered ionizer that uses a carbon fiber brush system to emit healthy negative ions into the air. By attaching themselves to air molecules and any impure particles in the air and negatively charge them, the emitted negative ions extremely purify the air and remove toxic subatances including the dust, odors and molds, etc. Can be put directly into computer USB port. Consistently releases negative ions. Helps boost your energy and mood.