1.PM2.5 measures air qualty 2Atmosphere light function: blue, yellow and red light (blue/good: Yelowimedium; Red/poor) 3. Light source: UV lamp function 1PCS 0.2W SMD3535UVC/265-275nm 4. Timer function:B hours /12 hours /24 hours 5. Wind speed 1/2/automatic gear 6. Siocp mode 7.CADR:230m2/h 8. H13 carbon coton fiter Carton:59.5x36x46mm/3pcs