Efficient Purification - With a CADR of 140m³/h, the Lifecreek Air Purifier can purify 1,084-ft² of space per hour. That means it can completely refresh the air in a 271 sq ft kitchen 4 times every houror fully circulate the air in a 542 sq ft bedroom 2 times per hour. Superior Filtration - The filter cartridge consists of 3 layers of filters, which can filter particles as small as 0.03 micron and PM 2.5 air pollution, removing 99.98% of airborne particles, effectively improving indoor air quality Air Quality Indicator -The light changes color in real time to show air quality: blue for good, yellow for fair, red for poor. Smart Control - In addition to touch operation, it can be controlled through SmartLife, which can be operated through your cell phone wherever you are. For example: set personal schedule, remote start or shutdown,timer shutdown, one-touch shutdown when you go out, etc Filter Replacement - In order to ensure the purification effect of the air purifier, please r