Mission KR174 RTKn
Rated for 1.2 acres and 40% grade — that is 21.8°, not 40°. On a real lawn, once you allow for borders and travel paths, plan on about 0.96 acres.
What it handles
Two-wheel drive, which caps how steep it can work. That is a flat-to-gently-rolling rating — a real slope will stall it.
Navigation is satellite-based without vision or LiDAR, so heavy tree cover is a real risk — it loses its fix under canopy. It also needs the maker's own RTK network to reach your address; check coverage before buying.
If your ground is steeper
These are rated for a similar area but hold more grade than the Mission KR174 RTKn’s 40%.
How confident we are
Cross-checked against the manufacturer and at least one other source.
Rated 1.2 ac on a 48h cycle, up to 1.7 ac on 72h. 40% grade (21.8 deg) across the whole Kress line. The one most buyers shortlist. Adds OAS obstacle avoidance. Needs Kress RTKn network coverage at your address — check before buying. Dealer-sold.