Mfresh Office Plasma Ionizer Air Purifier Tower Silver Room Purifier with Free Shipping The unit effectively eliminates odor, allergy, airborne microbes, mould and fungus spores, etc. Combines function with style and beauty, compact and portable A freestanding ionizer unit that creates a clean indoor environment. European design conform to safety standards Low cost of maintenance and operating, each ion tube can be used more than 9000 hours.