The air in your home is purified thanks to its 3-in-1 filter that lasts for up to 3 months of continuous usage (2200 hours). The first filter captures large particles such as hair and dust. The second filter, which is a HEPA filter, captures pollen, pollutants and air borne bacteria, and then the final carbon filter removes any unwanted odours. Replacement filters are available. Whats more, it has a built-in infrared sensor that continuously monitors the air quality in the surrounding space while in use. It displays a coloured LED indicator light to signal the air quality. If the LED indicator is blue, it means the air quality is good. Average air quality is shown as green and poor is shown as red. Plus, this air purifier comes with a multi-coloured light that displays 3 different colours to create a calming experience during the evenings. Plus, you set the lights intensity between standard and soft. TIMER SETTINGS: You choose between 2, 4 and 8 hours timer settings. THREE FAN SPEEDS: You adjust the purifier between low, mid and high settings SMART CONTROL: You can control this air purifier via the specially designed app that is available on both iOS and Android. REPLACEMENT FILTERS AVAILABLE. The dimensions for this air purifier are: 30cm Length x 30cm Width x 45cm Height