• 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 has actual legs(!), it still made me do a double-take when I saw it in action.

The reason is the mopping system. Rather than two spinning discs or a roller, it features a flat, D-shaped pad that extends almost entirely 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, getting right up to the edge. As far as I’m aware this is the only robovac with this style of mop pad that can do this trick – D-shaped pads are always fixed in place.

Unlike other robot vacuum mop methods, there’s no gap or border the mop pad won’t reach. It promises a clean that’s 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 cleaning fluid is diluted evenly.

You’re also granted 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 flooring in need of a clean.

Rock around the dock

An upgraded ‘RockDock’ base will also take care of pretty much all the maintenance for you. It’ll clean the pad with 212°F / 100°C hot water to remove grease and remove bacteria, then use 131°F / 55°C hot air to dry the mop. Actually, it’ll also dry the dock base and internal dust bag, to remove any risk of mold or odors.

Cleverly, the dock can also clean the pad on its own when it’s been dropped off in the dock when the rest of the bot is off on a vacuum-only run. This helps save time.

The Saros 20 Sonic is being launched alongside a sister model, the Saros 20 (an upgraded Roborock Saros 10R). The Saros 20 is similar, but has a different navigation system than the Sonic, and uses the popular dual spinning mop pad style rather than this D-shaped option. Both have a very innovative approach to cleaning thick carpet.

Rolling on

If you would prefer a roller mop, there’s now one of those in the lineup too. It’s installed on the Qrevo Curv 2 Flow, and again it’s extra-wide for complete mopping coverage. Like most similar robovacs on the market, the roller is fed continually with clean water as it rolls around, while the dirty water is siphoned off using 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 in the thoroughness of the self-clean cycle. The cleaning tray fully soaks the roller and scrubs it in clockwise and anti-clockwise direction to get it as clean as possible.

The dock uses hot water to clean the mop pads (at 167°F / 75°C it’s not quite as hot as the Saros 20 Sonic’s system, although should still do a good job of cutting through grease). It dries it using warm air.

The Saros 20, Saros 20 Sonic and Qrevo Curv Flow 2 will begin their international rollout this year, with pricing to be confirmed. Expect the Qrevo Curv Flow 2 to be slightly cheaper than the flagship Saros bots.

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Ruth is TechRadar’s Homes Editor specializing in air (vacuum cleaners, fans, air purifiers), and hair (hair dryers, straighteners and stylers). She has been in consumer journalism since 2020, reviewing and writing about everything from outdoor kit to mattresses and wellness gadgets, with stints on Tom’s Guide and T3.