Limited time offer! Get $20 off for trying the newest air purifier from InvisiClean. Certified 100% ozone free by the California Air Resources Board. No UV or ions that create ozone, a lung irritant. Sharp Electronic's PM2.5 sensor measures and detects changes in air quality. In auto mode, the fan speed will auto adjust to clear the air quickly and automatically. Easy to understand colors will show air quality in realtime. (Blue is good, Yellow is moderate, and Red is bad) Powerful DC motor with six speeds and delivers DOUBLE the air output using up to 82% LESS electricity than other air purifiers. Lowest setting will use less than 50 cents a month in electricity. CADR rated at 170CFM (AHAM standard) and will easily cover large rooms up to 319 ft². Features 6 fan speeds for ultra quiet operation, 3 stage filter(pre-filter, activated carbon, true HEPA), real-time air quality indicator, filter change indicator, child/pet lock to prevent accidental changes, timer to shut off automatically, and sleep mode to run in complete darkness. Enjoy your clean air and relax knowing that our 3 year warranty and lifetime support has you covered.