Sunseeker S4 LiDAR Robot Lawn Mower for Up to 0.25 Acre (1000 m²), Vision AI + 360° 3D LiDAR Navigation, Wire-Free Virtual Boundary, Systematic Cutting, 42% Slope, App Control, 60 dB Quiet Mowing
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30-day refund / replacement
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Availability:
In Stock.
Arrives
Sunday, May 17
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Features
- SELF-DRIVING-LEVEL NAVIGATION FOR REAL YARDS:Vision AI + 360 3D LiDAR builds a detailed 3D map of your lawn and plans systematic mowing pathsso S4 navigates real-world obstacles and uneven spaces with less babysitting and more predictable results.
- 3D LiDAR FOR COMPLEX YARDS: Say goodbye to GPS dead zones. Equipped with automotive-grade 3D LiDAR technology, the S4 navigates perfectly under dense tree canopies, tall eaves, and narrow passages where traditional RTK mowers fail completely.
- ZERO-WIRE, INSTANT 3D MAPPING: Set up in minutes, not hours. Drive the S4 via the App like a remote-control car to instantly generate a highly accurate 3D map of your yard. No perimeter wires, no base station calibration headaches.
- ALLSENSE FUSION SYSTEM: Powered by a 10 TOPS AI chip, the S4 fuses LiDAR point-cloud data with Vision AI. It maps, plans the optimal parallel cutting route, and mows with extreme precision, even in blinding sunlight or complete darkness.
- MILLISCEOND DYNAMIC AVOIDANCE: True intelligence on your lawn. The S4 doesn't just see static objects; it anticipates moving pets and avoids unexpected debris in real-time, ensuring zero collisions and a perfectly even cut.
- FUTURE-PROOF OTA UPDATES: Your mower gets smarter over time. The S4 receives Over-The-Air (OTA) updates, constantly improving its AI algorithms and adding new features, backed by premium all-weather durability.
- CERTIFIED, WEATHER-READY, AND BACKED BY REAL SUPPORT:Certified cTUVus and FCC compliant. Rated IPX6 (mower) / IP67 (charger), includes rain and lift/tilt sensors, PIN code, and Night Mode.
- AWARD-WINNING DESIGN & ENGINEERING EXCELLENCE:CES Innovation Awards 2026 Honoree (Home Appliances) a third-party recognition for design & engineering excellence.
- FEATURED IN TOP TECH MEDIA FOR INNOVATION & USER APPEAL: Featured in The Gadget Flows Best Products at CES 2026 editorial selectionhighlighted for innovation, design, and user appeal.
- CUSTOMER LOCAL SUPPORT: Real People, Ready to Help: Enjoy peace of mind with US-based customer support. Our local service team is ready to assist you with expert advice, troubleshooting, and guidance whenever you need it.Backed by 2-year warranty and hotline support: (MonSun 9AM9PM EST), .
Brand: SUNSEEKER
Power Source: Battery Powered
Material: Plastic, Polypropylene
Color: Silver Black
Style: Sunseeker S4 Robot Lawn Mower
Item Weight: 25 Pounds
Cutting Width: 7 Inches
Operation Mode: Automatic
Product Dimensions: 25"D x 16.5"W x 11"H
Smart Home Compatibility: Smart Home Compatible
Brand Name: SUNSEEKER
Model Number: SKRMS4
Required Assembly: No
UPC: 850060195723
Manufacturer Warranty Description: 2 Year Support
Manufacturer: SUNSEEKER
Manufacturer Part Number: SKRMS4
Item Type Name: Robotic Lawn Mower
Material Type: Plastic, Polypropylene
Power Source: Battery Powered
Operation Mode: Automatic
Smart Home Compatibility: Smart Home Compatible
Maximum Adjustable Cutting Height: 3.2 Inches
Minimum Adjustable Cutting Height: 1.6 Inches
Item Weight: 25 Pounds
Cutting width: 7 Inches
Item Dimensions D x W x H: 25"D x 16.5"W x 11"H
Color: Silver Black
Style Name: Sunseeker S4 Robot Lawn Mower
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, May 17
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
I looked at a few different robot mowers before buying this one, including some camera-only models. What convinced me was that Sunseeker actually comes from a lawn & garden background, so I figured their technical design wouldn’t involve any guesswork. Setup was easier than expected—mapping my yard took about 15 minutes, which shocked me because I thought it’d take an hour. The LiDAR picked up my fences, trees, and uneven spots right away without losing its signal, unlike what some reviews mentioned about other brands. It’s only been a few days, but so far the routes look clean and organized. I’ll keep using it through the summer and come back with an update on my experience.
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Reviewed in the United States on May 12, 2026 by Shaka
I wasn’t really sure a robot mower would fit my yard situation at first. A lot of the videos and reviews online make them look almost too “perfect,” which made me a bit skeptical. After using S4 for a while, I’d say it’s more practical than flashy. It doesn’t feel like a gadget you constantly need to manage — it just gradually takes care of the lawn in the background. There are still small things you notice here and there, but overall it’s been steady enough that I don’t really think about it once it’s running. For me, that realistic day-to-day performance matters more than the marketing claims.
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Reviewed in the United States on May 7, 2026 by Lucas L
I’m definitely not a tech-savvy person, but I went down the rabbit hole a bit before buying a robot mower. Looked at camera-based ones and a couple GPS/RTK models, but a lot of people were saying they can get weird around trees, shade, or patio furniture—which is basically my yard. Kept seeing people mention LiDAR as the more “set it and forget it” option, so I started leaning that way. This one seemed pretty straightforward, and the brand has been around in the lawn care space for a while, so I felt okay giving it a shot. Setup was easier than I expected, honestly. The AI mapping kicked in and got my yard mapped pretty quickly without me having to do much. It’s been running in a pretty clean pattern and hasn’t gotten itself stuck so far, which was a big issue with my old setup. It’s not flawless or anything, but it does what I wanted—no wires, no complicated setup, and I don't have to think about it much. That alone is a win for me.
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Reviewed in the United States on March 19, 2026 by Arthur
The media could not be loaded. I’ve been using a wired robot mower for a couple of years, and while it worked, the setup and boundary wires were always a hassle. I remembered Sunseeker from a few years ago but didn’t try it back then. When I saw their new release, I thought I’d give it a shot—and I’m glad I did. The setup was straightforward, and the AI mapping was impressively fast—it handled my uneven backyard without me having to intervene. The mower runs smoothly, follows clean paths, and doesn’t get stuck like my old one. On top of that, the package included a random sticker and 2 extra blades. I got the little dog sticker, and my dog was immediately curious and playful around it—such a fun little bonus. Overall, it feels like a real upgrade. It’s simple, reliable, and actually makes yard care almost effortless.
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Reviewed in the United States on March 9, 2026 by Richard Cooker
The media could not be loaded. The geek in me really likes this robot. It is well thought out from the packaging, accessories and spare parts, phone app, and even the shape of the robot itself. My experience of watching it [and they advise that it should not be operated fully autonomously] is like watching a new puppy; wonder and amazement with the knowledge that this little guy could get into trouble. This is a nice product, and undoubtably would suit the right person quite well. My opinion, but I think the target user has a push mower (perhaps with motor assist), and a dry or well drained, manicured lawn, up to the recommended ¼ acre. That’s not me. My property is much larger, never dry during the spring and autumn shoulder seasons, rarely completely dry during the summer, and the grass species are ones that will survive in standing water, bitter cold winters, and blazing sunshine in the brief summer. My riding lawn mower has tractor tires. It is probably no surprise that it ships in a large, heavy box. Unboxing and setup for charging was pretty-much intuitive, revealing the expected parts and accessories. Pleasant surprises were the printed cardboard insert that served as a quick reference, a roll of fitted red and white reflective strips to apply to the mower, and spare blades. Initial setup involved connecting the long charger and docking station cords [with a weather sealed connection], removing the shipping card and rolling the robot into the docking station, and plugging into a ground-fault protected outlet. A short whirring sound was followed by the confidence-inspiring blinking of the battery indicator. In under an hour from unboxing, the battery was topped up and ready for use. While charging and before use, the 26-page English Instruction Manual was read. [French and Spanish sections are also included.] These caution, ”Do not let the product operate when there is standing water in the area, such as an area with pools of water formed by heavy rain,” and all but preclude automatic operation on most of my property - though not a fault of the product. The app was downloaded from the app store and installed. It is required for initial setup [apparently programming coordinates into the robot], manual operation [driving the robot – left, right, forward and reverse], timed operation, and notifications. I experienced a little frustration with the app related to my network. For testing, I chose an area of rolling surface terrain about 20 x 60 feet generally rectangular, and dry enough to walk on without sinking. Two obstacles included a raised planting bed and a soft soil mound left over from a planting bed that had been removed. Setting up the boundaries was done manually as I could not convince the robot to do it automatically [and there was nothing to clearly define boundaries like fence or sidewalk]. The docking station was slightly outside the boundary, so the robot was carried a few feet. Operational noise gets lost in the background. The initial cut was quite impressive. The robot cuts in narrow, overlapping rows, and appears to turn around and recut spots if the grass is too long. This apparent feature would seem to make it ideal to maintain a manicured lawn. Battery performance [including mapping the outer perimeter and initial cut] lasted about half the area. The battery was recharged in a couple hours and finished the cut. [By my calculation at this rate ¼ acre would require four cut / charge cycles - most of the sunlight hours in a day.] This calculation may not be fair. My weather is mostly cloudy, most days. Manual setup and operation apparently require a positioning signal, and observation suggested that the signal was lost (e.g. boundary setup was frequently slow or unresponsive, and in operation the robot wandered well outside the boundary, then – presumably when coordinates were re-established - turned around and returned). Extra work performed -at least initially, though might improve as the robot better learns the area. As advised, operation should be monitored, and I was able to do yard work within sight distance. I also monitored operation by watching feed from a security camera. A few rescues were required (including the robot’s instance to climb the soft soil mound - see photo), while the solid structure of the existing raised bed was avoided by inches. When a rescue is required, the robot stops with an error, a notification is sent, and well-placed handles allow it to be lifted to a safe place to restart. Once the robot completed cutting the area, I received a notification on the app. Because I had initially carried it to the space, it spent a few minutes circling, and then locating and docking itself to top up the battery. Smart. [The docking station was in a sheltered area that was probably shielded from coordinate mapping.] If you like advanced products, like watching this thing, maybe don’t like mowing, and you have the yard for it, this might be for you. [Minor edit Mar 18, 2026.]
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Reviewed in the United States on March 16, 2026 by Kab
The media could not be loaded. Yeah, this one costs a bit more than some of the other LiDAR mowers I looked at. I compared specs side by side, and the LiDAR on this one really did look stronger. But honestly, what pushed me over the line was the fact that they have real customer support with real people. For something this expensive, I want a brand I can actually reach if something goes wrong. So even though it wasn’t the cheapest option, it felt like the safer choice—and so far, it’s been solid.
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Reviewed in the United States on April 29, 2026 by cxb.xb