This negative ion air purifier with highest output - up to 35 million negative ions/sec, filterless mobile Ionizer & travel purifier clean : pollutants, allergens, mold,odors etc.Efficient Purification: Ten of millions of negative ions can effectively clean the indoor polluted air and harmful substances, such as secondhand smoke etc.No Need to Change the Filters: Never worry about whether your air purifier filter is almost exhausted or the trouble of buying and replacing expensive air filters. The ion-box's filter-free technology purifies your air without any expensive maintenance or any cleaning you need to breathe easily.Silent operation: No noisy fans or motors, no electronetic radiation. You can enjoy fresh air and safely fall into sleep. Portable and Easy to Use: This pluggable air purifier will take effect automatically after plug in. It is a perfect gift compatible with family, friends, and office mates.size:50x40x100mmMaterial:ABScolour:BluePackage Contents:1 x Air purifierOnly 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. The measurement allowed error is +/- 1-3cm.