✔ Latest Air Purification Technology - Most powerful car air purifier ionizer releases 4.8 million negative oxygen ions per cm³ to charge the air to keep it clean, fresh and pure. ✔ More Features - Eliminates smoke, odor, pet and cigarette smell - Kills bacteria, viruses and mold -Freshens air - Dissolves smoke, dust, harmful gas particles and PM2.5 air pollutants - Ideal for passengers with allergies and breathing problems. ✔ No Filter Needed - Unlike vacuum HEPA air purifier freshener, this automobile ionic air purifier doesn't require filter and destroys odor-causing particles and improves air quality instead of masking odors like normal perfumed air fresheners.