* 16-27m² coverage area: As calculated in Air Purifier (GB/T 18801-2015) Appendix F.4: Area of application = pCADR × (0.07-0.12). pCADR data from CVC Testing Technology Ltd. Report no.: WTS2022-4212. * Traps 99.97% of 0.3μm particles:According to the China Testing & Inspection Institute for Household Electric Appliances Inspection Report (No. WCv-21-40115), the filter material used for this product achieved a filtering efficiency of 99.97% for 0.3μm particles. * 230m³/h CADR particle size: data from CVC Testing Technology Ltd. Report no.: WTS2022-4212. * 20dB Sleep Mode low noise: Refers to the value of the noise Generated when the product is in Sleep Mode. Data from CVC Testing Technology Ltd. Report no.: WTS2022-4212. * Only 0.7kWh required for 24 hours of cleaning: 27W×24h÷1000=0.684kWh. 24 hours consumption 0,684kWh, rounded to 0,7kWh. * Alexa is not available in all languages and all countries. Alexa functions and features may vary from region to region. Please refer to the official website for more information. * Room size of 48m² is used as a basis for 2 air changes per hour (ACPH), which means it can filter a 48m² room twice per hour (assuming the room has a ceiling height of 2.4m), room size = pCADR ÷ 2.4m ÷ 2. pCADR data from CVC Testing Technology Ltd. Report no.: WTS2022-4212. * Room size (up to) is calculated based on 2 air changes per hour (ACPH) and pCADR, meaning it can filter a room of this size 2 times per hour (assuming the room has a ceiling height of 2.4m), Room size = pCADR ÷ 2.4m ÷ 2. * Coverage area is calculated based on Chinese national standard GB/T 18801-2015, assuming ceiling height at 2.4m and taking into account factors such as outdoor particulate pollutant concentration at 300μg/m³ and the number of air changes in buildings, the standard is more stringent. Coverage area = (0,07~0,12)×pCADR.