High-efficiency negative ion air purifier with output up to 35 million negative ions per second. Filterless mobile ionizer and travel purifier that cleans pollutants, allergens, mold, odors, etc. Efficient purification: Ten of millions of negative ions can effectively clean indoor polluted air and harmful substances such as secondhand smoke. No need to change filters: Never worry about filter exhaustion or the trouble of buying and replacing expensive air filters; filter-free technology purifies air without expensive maintenance or cleaning. Silent operation: No noisy fans or motors, no electronic radiation; enjoy fresh air and sleep safely. Portable and easy to use: Pluggable air purifier takes effect automatically after plugging in, perfect for family, friends, and office mates. US Plug, applies to Canada, India, Mexico, Thailand, the United States, the Philippines, Taiwan and so on. Size: 50x40x100mm (measurement allowed error is ±1-3cm). Material: ABS. Color: As shown in the picture. Package Contents: 1 x Air purifier (only the above package content, other products are not included). Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.