This blue air purifier has an activated carbon filter with a fast fan that delivers 4 speeds of purification based on the air quality around you. It exceeds HEPA standards, trapping 99.98% of large, small, & micro-sized particles. The automatic adjustment tracks air quality and constantly adjusts power to maintain clean air in your home and it cleans up to 500 square feet. Its compact size (8.65"D x 8.65"W x 14.56"H & 6lbs) makes feasible to fit on a small surface and to move it around.