Bought this litte guy a couple years ago and he has served me well. Sadly, with a Shepard/Husky mix- the shedding is just too much for him and I need to upgrade to a more powerful robot. This model maps your entire floor and allows you to select one or more rooms to clean at a time, or zones, or the whole thing. It's super cool- does well with dirt and dust, knows when it hits an area rug and switches in to carpet mode. Can clean for about an hour on one charge- changed my life! I replaced/changed the main roller and side brush with genuine OEM parts. Works like new! Details: roborock S4 Max Robot Vacuum with Lidar Navigation, 2000Pa Strong Suction, Multi-Level Mapping, No-go Zones, Ideal for Carpets and Pets Robotic Vacuum -Precise every time, day or night: Precision Low Light Navigation-LiDAR navigation stays precise and effic in bright rooms and even in dark ones, keeping cleaning effective at all times. -Learns Your Home: Up to four levels of your home can be mapped and automatically recognized, including room locations, as well as up to 10 No-Go Zones, 10 No-Mop Zones, and 10 Invisible Walls on every level. -Powerful Yet Long Lasting: With powerful 2000Pa suction power and up to 180mins runtime, S4 Max can clean up to 3230sqft area, picks up finer dirt from hard floors and reaches deeper into carpets. When it identified carpet, it boosts suction power to the MAX level to provide the most powerful cleaning. With Roborock App, control is just in your hands