Buy it for
Big, mostly open properties of two acres or more.
Skip it if
Your large lawn has slopes steeper than about 50%.
Specs
| Max area | 2.5 acres |
|---|---|
| Max slope | 51% (27°) |
| Navigation | Dual RTK + VSLAM + VIO, with VisionFence cameras and ToF sensor |
| Setup | Network RTK where available; Navimow says a second antenna is sold separately. |
| Cutting width | Not listed on the source page |
| Cutting height | Not listed on the source page |
| Price seen | $4,499 on Navimow's US store |
What's good
- 2.5 acres, the most here
- Three-camera VisionFence obstacle detection
- Network RTK avoids a base station where coverage exists
What to know
- $4,499
- 27° (about 51%) slope limit
- Cutting width and height aren't listed on the series page
Will it fit your lawn?
Put your lawn size and slope into the fit calculator to see the Segway Navimow X390 next to every other mower we cover. The closest in size: Husqvarna Automower 440 iQ, Segway Navimow X450, Dreame A3 AWD Pro.
Sources
Specs and price checked 2 November 2026. We haven't tested this mower hands-on; this verdict compares published specifications.