- The Roborock Saros 20 Sonic has a wide, flat mop pad that vibrates and applies downward pressure
- Uniquely, it can kick out to the side for complete coverage
- Pressure and water can be adjusted independently
The Saros 20 Sonic is one of a number of new Roborock robot vacuums I’ve been able to check out at CES 2026. It’s an upgraded version of the popular Saros 10, and while it might not have the immediate wow factor of the Rover, what with actual legs(!), it still made me do a double-take when I saw it in action.
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The reason is the mop system. Instead of two rotating discs or a roller, it has a flat, D-shaped pad that extends almost completely from edge to edge, giving an impressively wide mopping area.
More than that, it can kick out to one side when it senses the edge of a room and gets right up to the edge. As far as I know, this is the only robovac with this style of mop pads that can do this trick – D-shaped pads are always fixed in place.
Unlike other robotic vacuum cleaner methods, there is no gap or limit that the mop pad cannot reach. It promises a cleaning that is both efficient and precise.
The pad has its own independent motor that delivers 4,000 sonic vibrations per minute) as it mops and applies up to 14N of downward pressure (1.75x that of previous Roborock bots) to break down and remove dried-on dirt. An automatic dispenser ensures that the cleaning liquid is diluted evenly.
You also get plenty of control over the mopping. You can adjust the water flow and vibration intensity independently, which is good news for – for example – those with water-sensitive hard floors in need of cleaning.
Rock around the dock
An upgraded ‘RockDock’ base will also take care of pretty much all the maintenance for you. It cleans the pad with 212°F / 100°C hot water to remove grease and remove bacteria, then uses 131°F / 55°C hot air to dry the mop. In fact, it will also dry the dock base and inner dust bag to eliminate any risk of mold or odor.
Cleverly, the dock can also clean the pad on its own once it’s been dropped off in the dock when the rest of the bot is off on a vacuum-only run. This helps to save time.
The Saros 20 Sonic will be launched alongside a sister model, the Saros 20 (an upgraded Roborock Saros 10R). The Saros 20 is similar, but has a different navigation system to the Sonic, using the popular twin rotary mop style rather than this D-shaped option. Both have a very innovative approach to cleaning thick carpet.
Roll on
If you prefer a roller mop, there is now also one of those in the selection. It is installed on the Qrevo Curv 2 Flow and again is extra wide for complete mop coverage. Like most similar robovacs on the market, the roller is continuously fed with clean water as it rolls around, while the dirty water is sucked off with a scraper.
In theory, this makes it a more hygienic type of robo-mop because the dirt is removed during the floor cleaning process and not just when the bot returns to its dock.
Where this model stands out is the thoroughness of the self-cleaning cycle. The cleaning tray completely soaks the roll and scrubs it clockwise and counter-clockwise to get it as clean as possible.
The dock uses hot water to clean the mop pads (at 167°F / 75°C it is not quite as hot as the Saros 20 Sonic’s system, though it should still do a good job of cutting through fat). It dries it with hot air.
The Saros 20, Saros 20 Sonic and Qrevo Curv Flow 2 will begin their international rollout this year, with prices to be confirmed. Expect the Qrevo Curv Flow 2 to be slightly cheaper than the flagship Saros bots.
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