Head to head
Segway Navimow X390 vs Segway Navimow X4
Price, coverage, slope, navigation, and drive for Segway Navimow X390 and Segway Navimow X4, side by side and cited.
- Store prices · checked 1 h agoVerified · checked 5 wk ago
2compared
10,118 m² (2.5 acres)largest lawn
Segway Navimow X390 (Navimow X390)·Segway Navimow X4 (Navimow X430)
Your lawn
Set your lawn to see which of these fits it.
Drive
2-wheel drive
All-wheel drive
Obstacle avoidance
Navigation
Wire-free. RTK GNSS plus onboard AI vision, no perimeter wire.
Wire-free. Tri-frequency Network RTK fused with 360° camera SLAM and VIO, with no antenna required where network coverage exists (a GNSS antenna is included). All-wheel drive.
Cutting
23.7 cm (9.3 in) cut, 50 to 100 mm (2.0 to 3.9 in) height, about 60 dB
43.2 cm (17.0 in) cut, 19 to 102 mm (0.7 to 4.0 in) height, about 68 dB
Rain
Weather-adaptive: pauses and returns to the dock in rain, snow, or frost (IP66)
Rain sensor plus weather-forecast adaptation; heads home when conditions worsen
Anti-theft
GPS tracking, PIN code, lift/burglar alarm, and a geofence out-of-boundary alert
GPS tracking, out-of-boundary and lift alarms, Apple Find My (locatable even powered off), Proximity Unlock and PIN code
Connectivity
4G, WiFi, Bluetooth (5-year free 4G service)
Bluetooth, Wi-Fi and 4G (1 year free on the X430, 2 on the X450, then $32.90 a year); Alexa and Google Home
Released
2025
2026
A check marks the lower price, the higher score, the larger coverage, and the steeper slope. Our pick below is derived from those same specs; the right choice still depends on your lawn, your budget, and how you'll use it.
Our pick
Which to buy
Best buySegway Navimow X390
For most lawns, the Segway Navimow X390 is the better buy at $4,499: it covers up to 10,118 m² (2.5 acres). Step up to the Segway Navimow X4 only if steeper than 50%.
From $4,499The bottom line
What actually differs
- Segway Navimow X4 has the lower price ($2,499).
- Segway Navimow X390 covers the most lawn (10,118 m² (2.5 acres)).
- Segway Navimow X4 handles the steepest slopes (up to 84%).
- Segway Navimow X4 is out of stock at every tracked seller right now.
Go deeper
Open the full record
BestRobotMower.co is an independent informational comparison site, not a manufacturer or a retailer. Specifications and prices are curated from public sources and can change or be incomplete. Always confirm the current spec, price, and availability with the manufacturer or seller before buying. Coverage and slope figures are rated maximums on an open lawn; real performance depends on your yard.