Search  for anything...
SUNSEEKER

Sunseeker S4 Robot Lawn Mower, 3D LiDAR, Vision AI, 0.25 Acre, Wire-Free

  • Based on 30 reviews
Condition: New
Checking for the best price...
$999.98 Why this price?
Save $300.01 was $1,299.99

Buy Now, Pay Later

As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by SUNSEEKER Tech official
Arrives Thursday, Oct 1
Order within 23 hours and 37 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Set name: Sunseeker S4


Features

  • For Complex 0.25-Acre Yards: Built for up to 10,890 sq. ft. with dense trees, shade, eaves, narrow passages, multiple zones, uneven ground, and weak-signal areas.
  • 360 3D LiDAR + Vision AI: LiDAR and vision build a 3D map; the 10 TOPS AllSense system plans systematic parallel routes in daylight, low light, nighttime, and weak-signal areas.
  • Obstacle + Terrain Response: 360 sensing identifies common static or moving yard obstacles and adjusts the route; rear-wheel drive handles bumps, ruts, 31.5-inch passages, and slopes up to 22 / 42%.
  • Wire-Free App Mapping: Drive S4 in the app to map without perimeter wire or base-station calibration; save 5 maps, create up to 100 zones/no-go areas, choose patterns and schedules, and resume after interruption.
  • Clean, Quiet Cutting: Six blades, 7-inch width, 1.63.2-inch height, floating cut and ride-on-edge mode support clean borders. 60 dB operation, rain-sensor return, app/voice control, and US support simplify care.
  • 2-Year Warranty & U.S. Local Support: Backed by a 2-year warranty and responsive U.S.-based service.

Description

LiDAR + Vision AI for trees, eaves, and cluttered yards. S4 mows smoothly in daylight, low light, and narrow or weak-signal areas. Smarter, Faster, Clearer. With 3D LiDAR and AI, S4 maps your yard automatically with precision. Supports multiple mowing patterns-so youcan style your lawn with precision andcreativity. 10 TOPS chip delivers 2X power for faster response, smarter navigation, and smoother mowing. LiDAR mapping ensures S4's navigation ls unofecte by trees, fences, shade or toll walls. Handles narrow passages down to 31.5 in / 80 cm Up to 5 saved maps + 100 zones for smart multi-zone control Edge Cutting + Ride-on Edge for a cleaner border line 360° horizontal coverage with 3D sensing to navigate real-world yard clutter Vision AI identifies common obstacles and adjusts in real time to avoid them 6 blades deliver faster, cleaner, more even cuts while preventing scalping on rough terrain. Floating Cut lets the deck follow ground contours to reduce scalping and contact on uneven lawns 7 in cutting width with adjustable height (1.6–3.2 in) for a cleaner, more consistent finish Control mowing in the app via Wi-Fi/Bluetooth, with voice support for Alexa and Google Home No boundary wire installation—faster setup with less effort, from day one Schedule mowing by day and time in the app for consistent, everyday lawn care Fixed-point resume returns to the charging station, then continues mowing from the last spot Rain Sensor detects rain and auto-returns to the dock to help protect your lawn from tracks US local team—real experts, no outsourcing or fake personas. Setup, Support, long-term care. Recognized at CES and validated by top-tier reviews. Proof you can trust—before it hits your lawn. S4: Complex Yard Expert X7: AWD Terrain Flagship X5 AWDTerrain Confidence X3+:Flawless Edge Master V3: Vision AI Starter Universal Blades X7 & X5 Garage

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


Number of Items: 1


Brand Name: SUNSEEKER


Model Number: SKRMS4


Number of Items: 1


UPC: 850060195723


Manufacturer Warranty Description: 2 Year Support


Number of Packs: 1


Manufacturer: SUNSEEKER


Item Type Name: SKRMS4


Manufacturer Part Number: SKRMS4


Item Weight: 25 pounds


Cutting width: 7 inches


Item Dimensions D x W x H: 25"D x 16.5"W x 11"H


Power Source: Battery Powered


Operation Mode: Automatic


Maximum Adjustable Cutting Height: 3.2 inches


Minimum Adjustable Cutting Height: 1.6 inches


Material Type: Plastic, Polypropylene


Item Highlight: Reliable wire-free mowing for homeowners with complex yards, trees, shade and narrow passages.


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: Thursday, Oct 1

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • I Thought the Trees Would Be a Problem... They Weren't.
Set name: Sunseeker S4
I’ve seen a lot of robotic lawn mowers struggle under trees or in shaded areas—they lose signal, stop in place, or just keep circling around trying to relocate, and eventually need manual “rescue.” My backyard doesn’t have very large trees, but there are quite a few smaller ones, so there are plenty of shaded areas. Before receiving the S4, this was actually my biggest concern. After installation, I stood under the trees and watched closely to see if it would behave like those reviews I had seen. But it didn’t. The S4 moved naturally from sunny areas into shaded areas without any hesitation, pauses, or repositioning issues. It simply followed its planned path and kept mowing as if the shade didn’t exist at all. What surprised me even more was the cutting result. I expected that areas under trees might be less evenly cut or slightly missed due to the complexity, but the entire lawn turned out very uniform. The shaded areas and open areas look almost identical—the grass lines are clean and consistent, like a professional landscaping crew had maintained the yard. Honestly, its stability in shaded areas and the final mowing quality both exceeded my expectations. If your yard also has trees or shaded zones, this is definitely something you can feel confident about. ... show more
Reviewed in the United States on July 9, 2026 by Celeste Z
    • It really works.
Set name: Sunseeker S4
Review Image by BP
Review Image by BP
I was skeptical when buying this, but hey, free returns right? Mapping the yard was the most difficult thing, and it wasn't that difficult. It says it will mow .25 acre, my backyard is .2 acre according to the robot and it has to come back twice to recharge. Not really a big deal since I'm not out there. It has seemed to get better at mowing my yard the more it mows it and gets as close to objects as I would. I do have to send it out a few times a week because it the grass gets too tall the robot avoids it like it's a tree or something. A few nice features are that it stripes the lawn beautifully, lines are perfectly straight, and you can make it mow in any direction, plus it will mow a small selection of preloaded patterns into your lawn, like numbers and symbols. It is super quiet, loudest noise it makes is the plastic body creaking. You can have it mow 24/7, but it is factory set to work from a little after dawn till dusk and if it senses rain it will wait two hours before mowing. All in all I love this robot. ... show more
Reviewed in the United States on July 12, 2026 by BP
    • You should buy it’s a very good
Set name: Sunseeker X5
It’s a great mower it’s been mowing my lawn for a few weeks now. It’s much better with all wheels powered than a 2 Wheel Dr. Model that gets stuck.
Reviewed in the United States on September 7, 2026 by Evan
    • Works great!
Set name: Sunseeker S4
We are enjoying the robot lawn mower. We have a hilly backyard and lots of flowers to mow around. Mapping with all our obstacles was tough, but it does a decent job. We only have to mow the edges (due to our mapping skills.)
Reviewed in the United States on July 17, 2026 by JAC
    • Awesome performance
Set name: Sunseeker S4
Love the mower. Set up was easy and it performs as described. I highly recommend.
Reviewed in the United States on July 11, 2026 by Allen
    • I would recommend
Set name: Sunseeker S4
Review Image by Steve kelton
Review Image by Steve kelton
Review Image by Steve kelton
Review Image by Steve kelton
Overall for the price this lawn mower is a good buy. I had to buy WiFi extenders so it would reach the corners of my yard. I have literally the highest internet available in my area so that was a shock. I do have issues with it constantly getting stuck on items. I watched videos of it going up and down hills and figured since I’m in Florida and everything is relatively flat and dry where I’m at it would have no issues, but just the hump from grass to sidewalk in my front yard catches it or a slight dip to where my plantar is. You have to keep it so far off the edge when you set the boundary that you end up having to weedeat over 18” around the yard. Still with the 114 degree heat index outside, I’d buy it again. It saves me time and from dying in the July heat in Florida. Thank god my wife works from Home and is able to get it unstuck every time it happens. Usually 5-7 times a week. I’m sure she is over my text messages asking. Her to move it lol ... show more
Reviewed in the United States on July 14, 2026 by Steve kelton
    • Great product
Set name: Sunseeker S4
Works really well
Reviewed in the United States on July 16, 2026 by roberto beier lobarinhas
    • Programming TERRIBLE
Set name: Sunseeker X5
Terrible programming
Reviewed in the United States on September 2, 2026 by Polly Horn

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...