At Navimow, from $1,399checked
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A LiDAR robot mower at $1,279.99 with 0.25 acre, a 42% slope limit, 90 minutes of runtime and a 2 year warranty, with no antenna.
- Max lawn size
- 0.25 acres
- Max slope
- 42 %
- Navigation
- LiDAR
- Cutting width
- 7 in
Our verdict
The S4 is a plain, mid-priced quarter-acre mower. As of November 9, 2026 it is $320 below the typical LiDAR mower, $1,599.99 (median of 12 in our data), and $5,120 per acre is about 5% above the $4,862 median. It lists a 7 inch cutting width, a 2.4 inch cutting height and a 24.3 lb weight, and our data has no noise figure.
For $120 more, the Dreame A3 AWD 1000 at $1,399.99 has an 80% limit, all-wheel drive and a 3 year warranty. For less, the Segway Navimow i210 AWD is $1,099 with RTK GPS plus camera, all-wheel drive and a 45% limit, and a 3 year warranty.
Choose it if the Sunseeker brand or its price suits you and the lawn is flat. Skip it if you have slopes, because the Dreame and the Navimow both cope better.
Strengths and weak spots
Worked out from the specs and prices on this page against the other robot lawn mowers we compare.
Weak spots
- 7 in: last on cutting width of the 45 robot lawn mowers we have this data for.
- 42 %: 84% of the 52 robot lawn mowers we compare do better on max slope.
- 2 years: 83% of the 37 robot lawn mowers we have this data for do better on warranty.
Where it ranks
How it scored in each list. A longer bar is better for you.
- Rank 31
Best Robot Lawn Mowers
Number 31 of 32 ranked
- Rank 14
Best Robot Mowers Under $1,500
Number 14 of 15 ranked
- Rank 26
Best Robot Mowers for Hills
Number 26 of 26 ranked
- Rank 31
Best Robot Mowers for Large Yards
Number 31 of 40 ranked
- Rank 8
Best LiDAR Robot Mowers
Number 8 of 8 ranked
- Rank 16
Best Robot Mowers Without an RTK Antenna
Number 16 of 16 ranked
Specifications
Each value links to the page it came from.
| Max lawn size | 0.25 acres | source, checked |
|---|---|---|
| Max slope | 42 % | source, checked |
| Navigation | LiDAR | source, checked |
| No boundary wire | Yes | source, checked |
| Needs RTK antenna | No | source, checked |
| Cutting width | 7 in | source, checked |
| Cutting height | 2.4 in | source, checked |
| All-wheel drive | No | source, checked |
| Noise | Not listed | |
| Water rating | Not listed | |
| Weight | 24.3 lb | source, checked |
| Warranty | 2 years | source, checked |
Prices
- $1,279.99at Sunseeker Official Store, price checked Check priceWe earn a commission.
- Amazonprice shown at AmazonCheck price at AmazonWe earn a commission.
Similar models
At Dreame US, from $1,399.99checked
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At Ecovacs US, from $1,499.99checked
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Keep reading
Robot Mower Installation and Setup
Robot mower setup takes an afternoon: place the antenna and charging station well, map with care, and prep the lawn before the first run.
Robot Mower Warranties Compared
Robot mower warranty compared: stated warranty years for every published model, from four years on Husqvarna to one on Ecovacs, and who lists none.
Robot Mowers Without a Boundary Wire
A robot mower without a boundary wire uses RTK GPS, camera or LiDAR to map the lawn. See how each works, what install needs, and which models need an antenna.