This is a great one for bedrooms, small office. It takes a little space only. Quiet operation and energy save. And it's also ozone free.

• Efficient reduction of airborne irritants, bacteria and allergens.
• Reduction of common household odors.
• No replacement filters or collection grids.
• Covers up to 500 square feet.
• Silent operation.
• Ultra-low energy use: runs only on 2.5watts.
• Release high-density negative ions (negative ions>/=1,500,000) to purify the surrounding air-- Negative Ions eliminate airborne contaminates such as dust, pollen, mold, smoke, pollution and pet dander.
• Dispense natural floral fragrances to enhance people's mood and help stimulate relaxation

Technical specifications

• Input: 120V AC, Output: 12V DC
• Size: 3"x4"x10"
• G.W.: 2 lb