The Beurer LR 400 air cleaner provides for clean, cleaned air in your home. The air is cleaned by a three-layer filter system consisting of pre-filter, HEPA H13 filter and activated carbon. Show Tests:Three-layer filter system with HEPA H13 filter filters particles with a size of 0.02 µm (viruses usually have a size of 0.02-0.3 µm), at least 95%).Particles with a size ⥠0.3 µm are even filtered out up to 99.95%. In addition to 4 fan levels and a turbo mode, the air purifier also has a timer function, automatic function and filter change display. With the beurer FreshHome app, the air purifier can be easily controlled on the move via smartphone.This text is machine translated.