---
title: "FJDynamics FR4000: specs and what the maker claims"
description: "FJDynamics FR4000 robot mower: slopes up to 65%, no boundary wire, list price $2,799. The maker's claims, not our tests."
canonical: "https://homerobotcompared.com/robot-mowers/fjdynamics-fr4000"
brand: "FJDynamics"
category: "Lawn mowers"
updated: "2026-10-09"
data_snapshot: "2026-10-07"
---

# FJDynamics FR4000

Lawn mower by FJDynamics. Every figure below is what the maker claims, collected 2026-10-07. We have not tested this robot.

List price (the maker's, not a store's price today): $2,799.

## Lawn and slopes

| Item | Value |
| --- | --- |
| Slopes | Up to 65% |

## How it finds its way

| Item | Value |
| --- | --- |
| Guidance | Satellite and camera guidance |
| Boundary wire | No |
| Wire-free | Yes |

Thin sourcing: check the maker's page. Source: https://au.fjdynamics.com/blogs/robotic-mower-blogs/husqvarna-420-iq-vs-fjd-fr4000-which-robotic-lawn-mower-is-right

Notes: 33deg=65%; store moved to shop.fieldfusion.ag; specs unverified

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---

Web page: https://homerobotcompared.com/robot-mowers/fjdynamics-fr4000