---
title: "Gardena smart SILENO sense 400: specs and what the maker claims"
description: "Gardena smart SILENO sense 400 robot mower: claims lawns up to 4,300 sq ft, slopes up to 25%, no boundary wire. The maker's claims, not our tests."
canonical: "https://homerobotcompared.com/robot-mowers/gardena-smart-sileno-sense-400"
brand: "Gardena"
category: "Lawn mowers"
updated: "2026-10-09"
data_snapshot: "2026-10-07"
---

# Gardena smart SILENO sense 400

Lawn mower by Gardena, released 2025. Every figure below is what the maker claims, collected 2026-10-07. We have not tested this robot.

List price: not available.

## Lawn and slopes

| Item | Value |
| --- | --- |
| Lawn size it can handle | 4,300 sq ft (400 m²) |
| Slopes | Up to 25% |
| Size group | small |

## How it finds its way

| Item | Value |
| --- | --- |
| Guidance | Satellite and camera guidance |
| Boundary wire | No |
| Wire-free | Yes |
| Needs a base station on the lawn | No |

## Cutting

| Item | Value |
| --- | --- |
| Cutting width | 16 cm |
| Cutting height | 25 to 45 mm |

## Connection and smart home

| Item | Value |
| --- | --- |
| Connection | smart app |

Some figures rest on fewer sources. Source: https://www.gardena.com/int/products/lawn-care/robotic-lawnmowers/smart-sileno-sense-400-m-robotic-lawn-mower/970818003.html

Notes: Camera Vision AI + satellite; 9.5 kg; not on UK category page

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Web page: https://homerobotcompared.com/robot-mowers/gardena-smart-sileno-sense-400