Every robot vacuum owner knows the door sill that ends the run: the machine reaches it, tries twice, gives up and goes home with half the house untouched. Roborock built its Saros 20 around that problem with a body that lifts itself over obstacles, and the robot is part of Amazon’s Prime Big Deal offers, where Prime members can get the Roborock Saros 20 for $1,179 instead of $1,599. That is still a serious budget, for a machine that leaves very little for its owner to do.
Climbs Thresholds, Slides Under Sofas
The mechanism is called AdaptiLift Chassis 3.0: Using a climbing arm and extra wheels, the robot raises its body to get over raised thresholds, balcony sills and the U-shaped legs of some chairs, without interrupting suction. Roborock quotes a maximum of 3.46 inches for a two-step threshold, a figure that comes from its own tests and applies only when each step stays within set limits. I’d treat that number as a best case. The everyday benefit is simpler, since the ordinary sills between a hallway and a bathroom stop being a border, and carpets up to 1.18 inches thick are handled the same way.
Height matters in the other direction too: The Saros 20 is just over 3 inches tall, so it passes under many sofas and beds where dust collects for months. Navigation relies on 3D sensors that map rooms in real time, and a color camera identifies more than 300 types of obstacles to steer around floor clutter. The same camera lets you look in on a pet from the app while you are out. Some households will love that, and others will want to think about a camera that roams the home.
Cleaning power is rated at 36,000Pa which Roborock says is up to 63% more than its earlier Saros Z70. Two anti-tangle brushes deal with long hair and pet fur before it wraps around the roller. For edges, an arm pushes the side brush and a mop outward to reach corners and baseboards, and curtains can be marked in the app so that the robot cleans behind them where another model would treat them as a wall.
What happens after the run is handled by the dock, and its list of functions is long. It washes the mops with water heated up to 212°F, dries them with air at 131°F, cleans its own tray, doses detergent and empties the robot’s dust for up to 65 days. The dock can also remove the mops from the robot automatically. Charging takes two and a half hours, voice commands start with “Hello Rocky”, and the robot connects to both 2.4GHz and 5GHz Wi-Fi. My reservation is about need: for a small apartment with hard floors and no steps, this is far more machine than the job requires.
Prime membership is required: the Roborock Saros 20 costs $1,179 on Amazon against a list price of $1,599, as a Prime Big Deal. The Saros 20 Flow, a separate version, is listed at $1,359 on the same page, and returns are free.