Neato XV-21 pet & allergy are featured with combo brush. It is designed uniquely for picking up the pet hairs. This is quieter specifically on the hard floors like tiles and wood. This feature with patented laser guided technology, which can maps and scans the plans, room, and methodically cleans, moving automatically from one room to others. The other features must be filtered, bigger brush, and dirt bin. It can pick up more debris and dirt than the other product. With this product, you can schedule the daily cleaning or push the button for instant multi rooms or spot cleaning. This goes back automatically to charge the base and returns to where this is left off. It is available in several types which will be explained as follow.