Features:

• Best used for a room up to 160 square feet (16x10)
• Includes one filter.
• Quiet operation - Enjoy clean air...in peace and quiet.
• Perfect for home or office.

Editor Reviews:

Product Description:
Filtrete features: Filter change indicator senses the particle accumulation on the filter, taking the guesswork out of changing the filter. No ozone generation. 3 speed fan. Streamlined and stylish - contemporary design blends discreetly in any dcor. Highest combined Clean Air Delivery Rate (CADR) for dust (128), smoke (103) and pollen (149) among all air purifiers designed for rooms of up to 160 square feet. High Dust and Allergen Capture Rates - Advanced Filtrete filtration technology effectively captures 99.9% of airborne particles and allergens like pollen, mold and dust mite debris.

Rating : - Doesn't clean as well as hoped
I purchased this off woot and got it new. After having used it for 5 days, I've noticed a few things.

This doesn't really clean the air, it mostly helps circulate it and remove larger airborn particles (such as hair).
It doesn't clean air that well, since it pulls it in through the front (broad-side), but it has a plastic cover over the inlet, limiting it to the gap between the cover and base.
The amount of "dirty" air it pulls in is severely limited, since the unit is so low to the air, and it blows it out the top, so if you throw a bunch of dust into the air, the purifier will push it around the room before it cleans it out.

3M did a pretty good job designing a cheap air filter that runs fairly quietly. Low is the only mode that I can call "quiet". mid and high are pretty noisy. Plus the wheel inside that's the fan wobbles, creating an oscillating hum.