The Blueair Sense+ is quiet, stylish offers multiple control options and features an improved filter design that include carbon pre-filters and are pretty easy. True to the brand, this Blueair offers extremely quiet operation and a high level of air exchanges for a healthier, cleaner environment. The Sense+ also draws less energy than a typical light bulb so you will not experience high electrical operating costs. We love the hand motion controls that allow you to change air flow speed by a simple wave of the hand. The free, downloadable Blueair Friend App brings air purification monitoring and controls to a whole new level of sophistication and will be appreciated by anyone with a smartphone.