Rated Power : 35W Power Supply : 220-240V~ 50-60Hz Noise Level : 30-52dB Standby Power : <0.5W Power Button : Turn the purifier ON or OFF Night Light : Optional night light. Or entirely turn it off Sleep Mode : Quiet operation display-off 4 Fan Speeds : Purifies the air as effective as you want Filter Change Indicator : Easily remind you to replace the filter Timer : Set 2, 4, 8 hours to turn off automatically Improved Filtration: With larger expansion area and longer length than others, the HEPA filter works with ultra-fine Pre-filter and activated carbon filter, trapping 99. 97% of fine particles as small as 0. 3 microns and large pollutants such as pollen, dust, pet dander, smoke