High-efficiency filtration - traps 99.97 % of particles as small as 0.3 microns, effectively resisting pollen, pet dander and other allergens Compact size and small footprint - easy to place on a desk, on the ground, or hidden away somewhere Real-time air quality monitoring, with an intuitive four-color indicator light Smart control with Xiaomi Home App, works with Google Assistant and Amazon Alexa Ultra-quiet & power efficient brushless DC motor - operation noise as low as 20dB under sleep mode; maximum of 27W of power consumption (1/3 lower than the competition)