Sunseeker S4 LiDAR Robot Lawn Mower
- Up to 0.25 acre lawn
- 31-45% slope
- LiDAR + Vision
- Up to 8 in cut
SVT Score
A LiDAR and camera wire-free mower that Sunseeker rates for lawns up to 0.25 acre, with no antenna or station to set up.
$1,280
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Usability
5.2 out of 10Strengths
- No antennastation or wire to install
- Maps under trees without a sky view
- No-go zones drawn in the app
- Blades stop when the mower is lifted
- Cameras and LiDAR steer around obstacles
Drawbacks
- Cannot mow in rain or fog
- Narrow cut for the price
- Stated edge distance differs between page and FAQ
- Lawn edges still need a trimmer pass
- No 4G or GPS theft tracking
- Battery warranty shorter than the mower's
A smart pick for shaded small yards, but it stops in rain
Specs
- TypeSmall
- BoundaryWire-free
- NavigationLiDAR, Vision
- Rated AreaUp to 0.25 acre
- Area per ChargeUp to 0.1 acre
- Slope31-45%
- Cut WidthUp to 8 in
- Cut Height RangeUp to 2 in span
- Drive2WD
- Noise56-60 dB(A)
- Ingress RatingIPX6
- ConnectivityWi-Fi, Bluetooth
- Warranty2 Years
- CertificationsANSI/OPEI 60335-2-107 listedCSA C22.2 No. 60335-2-107 listed
At a glance
- CES 2026 honoree
- Alexa and Google Assistant
- Spot cutting mode
- The mowers are made by Zhejiang Sunseeker Industrial Co., Ltd. in Zhejiang, China.
- US support and service run through Sunseeker North America, Inc. in Indian Trail, North Carolina.
- Sunseeker robot mowers are sold in the US by SUNSEEKER US, Inc., which runs the shopsunseekertech.com store.
- The US store sells four wire-free mowers rated from 0.15 to 0.5 acre.
- The mowers are also sold through Sunseeker's Amazon store and listed at Home Depot, Lowe's, Best Buy and Walmart, where a third-party seller lists them.
The Sunseeker S4 (model RMR1001M20V) is a wire-free robot mower that maps the lawn with a 360-degree 3D LiDAR and a front camera, with no RTK antenna or boundary wire to install.
Sunseeker rates it for lawns up to 0.25 acre and for slopes up to 42% (22°), and states 90 minutes of work and an 80 minute charge per cycle at 187 m² an hour under test conditions.
Its US manual lists a 180 mm (7.1 in) cut, a manual height range of 20 to 60 mm, a 4 Ah battery, a 60 dB(A) sound power rating, rear-wheel drive and up to 100 zones, while the product page lists 1.6 to 3.2 in. It weighs 11 kg, measures 638 x 422 x 274 mm and carries an IPX6 rating.
The store also lists the S4 with a blades kit, with a garage, and as a Premium Bundle with both, each at $1,279.99, and sells the S4 garage alone at $199.99.
