This Negative Ion Air Purifier Air Purifier With Highest Output - Up To 20 Million Negative Ions/sec, Filterless Mobile Ionizer Travel Purifier Clean : Pollutants, Allergens, Mold,odors,etc Efficient Purification: Tens Of Millions Of Negative Ions Can Effectively Clean The Indoor Polluted Air And Harmful Substances, Such As Secondhand Smoke Etc. Economical: Filter-free. Worry About Whether Your Air Purifier Filter Is Almost Exhausted Or The Trouble Of Buying And Replacing Expensive Air Filters. The Ion-boxs 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 Electromagnetic Radiation. You Can Enjoy Fresh Air And Safely Fall Into Sleep. Easy To Use: This Pluggable Air Purifier Will Take Effect Automatically After Plug In. It Is A Gift For Family, Friends, And Office Mates. Plug Type: Us Plug,it Applies To Canada, India, Japan, Mexico, Thailand, Taiwan, The United States, The Phil