Roborock Saros Rover: the robot vacuum that climbs stairs

Roborock has unveiled a prototype at CES 2026 capable of tackling one of the major limits of autonomous cleaning: stairs. Known as Saros Rover, the device combines two drive wheels with articulated, extendable legs to climb and descend steps, keep its body level and vacuum while moving. It is not a product available in stores, but a technology demonstration whose design may still change.

The proposal matters because the Saros Rover is not merely designed to carry itself between floors. Roborock has presented it as a machine capable of cleaning the steps themselves while moving upward, including carpeted stairs and rounded edges. The company has not confirmed a price, battery life, release date or final retail configuration, so its abilities should be understood as those of a prototype under development.

If you have a problem with your robot vacuum, you can use our free error code finder. From there, you can identify and solve all errors easily and effectively.

Roborock Saros Rover, a prototype designed to overcome stairs

For years, robot vacuums have improved their navigation, suction power and mopping abilities, yet almost all of them still rely on the same architecture: a low body, two side wheels, a front caster and a circular or square base. That format works very well on flat surfaces, but stops at a step. A height difference of only a few centimetres can turn an accessible room into an unreachable area.

The Saros Rover approaches the problem through mobility. Its articulated legs are integrated into the wheels and can extend, rotate and retract the body to negotiate each step independently. The movement resembles a small robotic platform more than a conventional appliance: it first seeks support, then raises part of the structure and finally repositions the wheels before continuing.

The available information comes from presentations and demonstrations held by Roborock at CES 2026. It is not yet a retail specification and does not reveal how the device would perform in a home over several weeks. Public tests show the manufacturer’s direction and the basic mechanism, but factors such as joint wear, noise, battery life and safety on real stairs remain undefined.

How it climbs and descends each step

The key to the design is that the two wheels do not work as one rigid block. Each assembly can react independently while the legs change the robot’s height and angle. This freedom allows the device to distribute its weight, keep its centre of gravity within a stable area and move from step to step without tipping easily.

Motion sensors and three-dimensional spatial perception help the machine calculate the geometry of the staircase. Before making the next move, it must identify the edge, estimate the available depth and decide where to place the wheel. Artificial intelligence does not replace the mechanics, but it coordinates them precisely when height, slope or surface material changes.

In the released footage, the robot can raise its legs and even perform small controlled jumps over obstacles. That does not mean it is ready to jump along an entire staircase or handle unpredictable irregularities without supervision. The jumps are part of a demonstration of stability and dynamic response, not a household function that users can assume will always be available.

Descending presents a different challenge. As the robot moves down, its weight tends to shift forward and any loss of traction could cause a slide. Speed control, alternating wheel support and continuous edge detection are therefore as important as motor strength. A final product would have to prove safe behaviour on narrow, wet or dark staircases and on steps partly occupied by objects.

What the Saros Rover can clean while moving

The main difference from robots that only climb stairs using tracks is that the Saros Rover is designed to work while ascending. Its vacuum system can collect dust, hair and small particles deposited on the step, preventing the staircase from remaining an area the user has to clean separately. In a multilevel home, that continuity could change how cleaning routines are organised.

Roborock has also shown the prototype on carpeted stairs with rounded edges. This is demanding because carpet changes traction and can partly hide the step edge. Rounded corners also provide less defined support than a straight edge. The combination of sensors, wheel control and articulated legs is intended to compensate for those difficulties, although the actual result will depend on pile height, carpet tension and surface condition.

The prototype presented does not include, at least according to the public information currently available, a mopping system. That separates it from much of Roborock’s current home range, where high-end models vacuum, mop and return to a dock that washes and dries the accessories. The Saros Rover focuses on mobility and vacuuming, a reasonable decision for a prototype whose main challenge is moving safely between levels.

Cleaning one step also does not mean covering an entire staircase with perfect precision. The usable width, banisters, wall-side areas and step shape may restrict its route. In the demonstrations seen so far, the robot mainly travels through the centre, while Roborock has said it is working to expand coverage. Until independent tests are available, it cannot be confirmed that the machine will reach every corner or the edge beside the skirting board.

The technology behind hybrid mobility

The Rover combines wheels and legs because each system solves a different part of the problem. Wheels provide efficiency and speed on flat floors; legs change the height, cross discontinuities and stabilise the body when the surface is no longer continuous. Hybrid mobility is intended to combine speed with obstacle-crossing ability.

Three-dimensional perception is equally important. To climb stairs, the robot must distinguish the step, estimate the distance to the next support point and recognise objects, cables or people in its path. Motion sensors provide data about tilt and acceleration, while algorithms convert that information into instructions for the motors.

In a real home, lighting can change sharply between a living room and a stairwell. There may also be dust along the edges, abandoned toys, socks, pets or a half-open door. A system designed for a clean demonstration surface must adapt to a far messier environment. Everyday reliability will matter more than the spectacle of a jump.

The mechanical structure adds moving parts and therefore more potential maintenance points than a traditional robot. The joints would need to withstand thousands of extension and retraction cycles without losing accuracy. The motors would also need protection from dust, while hair would have to be prevented from collecting around the axles. Every mobility improvement can mean greater weight, higher energy consumption and a higher manufacturing cost.

What is known about battery life, price and release

Roborock has not announced an official release date for the Saros Rover. It has also not disclosed a specific battery life, final dimensions, weight, dustbin capacity or charging dock. This is not unusual: equipment shown at a technology fair may be used to validate an idea before the manufacturer decides whether to turn it into a consumer product.

Cost would be one of the main obstacles. A robot that can travel across floors, tilt, lift itself and clean steps needs additional sensors, more complex motors, a battery capable of powering several actuators and a durable frame. Its price is unlikely to be close to that of a conventional robot vacuum, although any current figure would be speculation rather than an announced price.

Battery life will also depend on how the device is used. On a flat floor, wheels consume relatively little energy; climbing stairs requires the legs to lift part of the system against gravity. The robot might need to return to its dock more often or limit the cleaning of multiple floors to scheduled sessions. Thermal management and charging speed would be decisive for making the concept practical.

The maintenance dock is another open question. Advanced Saros models include stations that empty dust, wash mops with hot water, dry accessories and refill the water tank. A Rover without mopping would need less support, but it would still have to empty its dustbin, recharge and allow the legs to be inspected easily. An oversized dock could offset some of the space saved by eliminating the need to carry the robot between floors.

How it fits alongside Roborock’s current models

The Saros Rover should not be confused with the Saros 20, Saros 10R or other robots Roborock sells or is preparing for conventional homes. Those models are designed for flat floors and focus on navigation, suction, mopping, obstacle detection and automated maintenance. The Rover belongs to an experimental category because it attempts to solve a physical problem that the others avoid.

The Saros 20, for example, has a lifting chassis capable of overcoming certain thresholds. Manufacturer information says it can handle a first obstacle of up to 4.5 centimetres and a second of up to 4.3 centimetres under specific conditions, with a combined height of up to 8.8 centimetres. That mechanism improves movement within one floor, but it does not make the robot suitable for climbing stairs.

Conventional models also offer benefits the Rover has not yet demonstrated. They can vacuum and mop in one session, recognise rooms, lift or detach the mop near carpets and return to a multifunction dock. Some feature advertised suction of up to 36,000 Pa, anti-tangle systems and advanced navigation. For a single-storey flat, these functions will probably provide more everyday value than a climbing ability still in the experimental stage.

The right choice would therefore depend on the layout of the home. A multilevel house with frequently used stairs is where the concept makes sense. In an apartment without level changes, the extra complexity may contribute little. Innovation does not always mean a more convenient purchase; its usefulness depends on the obstacle present in the home.

Safety and domestic-use challenges

A staircase introduces risks that do not exist in a room. A fall could damage the robot, break a step or strike someone below. Void detection would have to work even when the edge is dark, covered by carpet or partly hidden in shadow. The system would also need to stop near a pet or child without losing balance.

Stability during the climb is not the only criterion. The robot would need to remain still when someone steps nearby, withstand a sideways touch and prevent a wheel from slipping on polished wood. A good robot is not one that always tries to move forward, but one that knows when to stop.

Privacy will also matter if the model uses cameras to interpret its surroundings. Roborock already uses sensors and cameras in some devices to recognise objects, locate pets and improve navigation. A machine able to travel through the whole home could record areas that remain outside the view of a conventional robot. Image processing, storage and app controls would need to be explained clearly before any potential sale.

Daily maintenance will shape the experience as well. The legs could collect hair around the joints, dust in the bearings or residue on the support surfaces. Users would need access to those areas without special tools and with clear instructions. If cleaning the mechanism required frequent disassembly, the promise of automation would lose some of its appeal.

Why the prototype has attracted so much attention

The robot vacuum market has advanced quickly in navigation and automation, but most products have kept a very similar shape for years. Improvements have focused on more power, better mops, more complete docks and greater app control. The Rover changes the discussion because it offers a visible solution to a problem that all flat-floor robots leave untouched.

The sight of a small robot lifting its wheels, using legs and climbing a step is easy to understand even for people who do not follow technology. There is no need to interpret suction figures or compare algorithms: it is enough to see that the device moves where it could not move before. Its media appeal comes from a clear physical capability, not just an internal improvement that is difficult to observe.

The presentation also reflects a broader trend in domestic robotics. Manufacturers want devices to leave strictly predictable routes and operate in spaces with obstacles, level changes and shifting objects. That evolution brings household appliances closer to general-purpose mobile robots, although a major gap remains between a controlled demonstration and daily family use.

Interest does not guarantee that the product will arrive soon or retain the same form. Roborock could modify the legs, reduce their reach, add mopping or abandon the project if safety and cost do not reach an acceptable level. Technology history is full of striking prototypes that explored a direction without becoming mass-market products.

The future of autonomous cleaning will have to overcome level changes

The Saros Rover is one of Roborock’s most ambitious proposals because it attempts to take robotic cleaning beyond continuous surfaces. Its articulated wheels and legs make it possible to imagine a home where the robot does not need to be carried between floors. They also reveal a complex technical path in which battery life, stability, maintenance and price matter as much as the ability to climb a step.

For now, the available information supports describing it as a robot vacuum prototype with hybrid mobility, not as a model ready to buy. It can climb and descend stairs in demonstrations, stay balanced and vacuum while moving, but essential details about long-term performance, safety, battery life, step coverage and mechanical durability are still missing. Commercial claims can only be evaluated once a final product and independent testing exist.

The real innovation will be measured when the robot faces everyday life without a prepared setting: a narrow staircase, a displaced rug, dust on the edge, a curious pet and a battery running low halfway through the journey. If it solves that combination without requiring constant supervision, the concept could open a new chapter for robot vacuums. Until then, the Rover is mainly a signal of where the industry wants to go.