High efficient dust removable is offered by this nicely-built HEPA filter. It has a 99.97% efficiency on a 0.3?m particle. The LED display features a colored10 segment bar-graph, which shows the air flow level and filter status. The filter status is displayed as yellow when it needs changed, and green when it is in normal condition. There are UV lamps installed in the air-path in the back panel as well as the workspace. They help to sterilize incoming air, and automatically turned off when the glass door is opened.