Dyson, Heather Braga/BuzzFeedIt features a sensor that measures and counts dust particles (shown left above) and displays the data as you clean. This allows you to validate how deep you are cleaning your surfaces.It can last for up to an hour, which is quite impressive for a cordless vacuum! The back of the vacuum has an LCD screen (shown right), that displays how much time is left.It features a laser built into the device that highlights dust on hard surfaces so you don't miss any spots again. It's the most satisfying cleaning feature that I have ever used (more details later).