The expert for robots in your home



Back to overview
  • Hurry up. This special deal will end shortly.
  • Extended Guarantee. This product has an extended guarantee.
    Guarantee period starts on 01.03.2021
  • Hurry up! The offer ends soon.

Including free 5-year guaranteeIncluding free 5-year guarantee
Yard Force Compact 400Ri - robot lawn mower (2021 model)

Yard Force Compact 400Ri - robot lawn mower (2021 model)

Including free 5-year guaranteeIncluding free 5-year guarantee

Unit price:

Special Price €429.00 €499.00
You save €70.00 Offer ends 26.02.2021

* Prices in EUR incl. VAT and delivery, if applicable

Due to a high volume of orders, the delivery time of our delivery service providers may be extended. Read more
  • Express shipping available

    You will have the opportunity to select DHL Express. Orders which are placed until 12.00 p.m. and are in stock, will be shipped on the same day. The additional fee depends on your delivery address and cart.

In stock 11
In stock 11
Use your favourite payment method:

Most popular payment methods:

All payment methods
Including free 5-year guaranteeIncluding free 5-year guarantee

More information about product

Yard Force Compact 400Ri a compact, smart garden helper.

This robot lawn mower, Yard Force 400Ri, for small gardens is fully equipped with modern technology. It has ultrasonic sensors to ensure safe driving on the lawn, as this enables it to detect obstacles at an early stage so that it does not collide with them. Thanks to its many technical features, the Yard Force compact 400Ri robot grass cutter can manage up to 400 m2 and a slope of 30 %. You can control the robot mower comfortably via a smartphone app and conveniently can monitor your lawn over the screen. The Yardforce Compact 400Ri's USB port makes upgrades and error analysis easy.

Due to a high volume of orders, the delivery time of our delivery service providers may be extended. Read more
  • Express shipping available

    You will have the opportunity to select DHL Express. Orders which are placed until 12.00 p.m. and are in stock, will be shipped on the same day. The additional fee depends on your delivery address and cart.


Add additional services and benefit from their reduced price:

myRobotcenter - 5-year Guarantee
5-year guarantee
Read more
Yard Force - Garage for all models
Yard Force - Garage for all models
View product

Most popular payment methods:

All payment methods

Product description

Smart robot lawn mower for medium-sized gardens up to 400 m2

Who is the robot mower suitable for?

Its terrain is medium gardens that are simple to slightly complex. Its weekly output is 400 m2. Once programmed, the robot grass cutter works completely independently. Thanks to its good tyres and the powerful li-Ion battery, Yard Force compact 400Ri can master slopes of max. ±30 %. The cutting height is selectable in 3 steps and can be set between 20 and 55 mm.


How does the Yardforce Compact 400 Ri work?

The robot lawn mower performs its work reliably and, when starting work, first mows along the boundary wire, i.e. along the edge of the property, and then works in a free movement pattern, covering the lawn area. In doing so, the robot mower adapts the mowing speed to the conditions and regulates the speed accordingly.


If its lithium-ion battery becomes weak, it looks for its charging station, charges itself and then continues mowing again. If it starts to rain, the robot grass cutter's rain sensor reacts and causes it to pause. When the sensor dries again, it continues mowing.


A healthy lawn thanks to the mulching function

During its work, the grass is always cut a little. This is done with three sharp blades mounted on a rotating blade disc. With the mulch (grass cuttings) falling to the ground, the lawn is fertilised and thus remains healthy. The height-adjustable blades between 20 and 55 cm and the 16 cm cutting width allow the robot mower to cut your lawn to the desired length.


"Mowap app” for all Yardforce robot mowers

The Yardforce Compact 400Ri can be connected to the Wi-Fi and controlled via the "Mowap App". The app is available free of charge in the iOS and Android stores and is supported in 13 languages.

Yard Force Compact 400RiYard Force Compact 400Ri
Mittlere Gärten bis 400 m2Mittlere Gärten bis 400 m2

Medium gardens up to 400 m2

The compact robot lawn mower from Yard Force is suitable for gardens up to 400 m2. With its powerful li-ion battery, it can easily manage slopes in the working area of up to 30 %. Even complex, uneven gardens are no problem for it.

bequem starten oder stoppenbequem starten oder stoppen

Also start or stop conveniently via button

The operating modes "One Key Start" and "One Key Home" make the handling of the robot mower very simple. So it is possible to start the robot and return it to the charging station at the touch of a button. It could hardly be easier!

Bequem einrichten per AppBequem einrichten per App

Rapidly installed and easy to operate

The robot grass cutter can be installed in just a few steps. The necessary material for commissioning is included in the scope of delivery. The setup is done via the display on the device itself as well as via the app. The smartphone app is available free of charge for iOS and Android.

Steuern des Yard Force Compact 400Ri durch eine App Steuern des Yard Force Compact 400Ri durch eine App 

Smart control for iOS and Android

The smart control via app rounds off the overall package of the robot mower. The app can be downloaded free of charge from the iOs and Google Play stores. The app supports 13 different languages.


Please note, that not all functions are possible without the app - therefore it is recommended to install the app on your smartphone.

Ultrasonic technology for obstacle detection

With the iRadar technology, also called ultrasonic technology, the Yard Force 400Ri can detect obstacles. By detecting obstacles at a distance of approximately 0.2 to 2 m, the robot lawn mower can take early evasive action and avoid a collision. This is a great advantage over comparable models, because many other robotic lawn mowers only react after colliding with an obstacle.


USB interface for updates + fault diagnosis

The robot lawn mower is equipped with a USB 2.0 interface. This allows updates as well as a simple error analysis to be carried out. It is therefore not always necessary to send in the Yardforce Compact 400 Ri for an update. The manufacturer Yard Force provides firmware updates via download - these can then be quickly installed on the Yard Force robot mower.


Quick and easy installation

Before the robot lawn mower is used, the boundary wire must be installed, which serves as a boundary for the robot's working area. The installation and also the start-up are very simple and can be done by yourself. The material required for the installation is included in the delivery. The instruction manual will help you to use the boundary wire, wire connectors and other accessories correctly.

Our summary of the Yard Force Compact 400Ri

What are the benefits of the Compact 400 Ri from Yard Force?

  • Numerous safety functions ensure reliable operation 
  • Mows slopes up to max. ±40 %
  • Multi-zone programming via app
  • Ultrasonic sensors for early obstacle detection

Are there any disadvantages with this model?

  • If no operation via app is desired - this model should not be selected.

Scope of delivery

Yard Force Compact 400Ri
Yard Force Compact 400Ri - robot lawn mower (2021 model)
  • Charging station
  • Boundary wire (100 m)
  • Pegs (120 pcs.)
  • Wire (9 m)
  • Replacement blades ( 3 pcs.)
  • Replacement screws ( 3 pcs.)
  • Connectors (3 pcs.)
  • Distance ruler
  • Manual

Technical details

More information
Model NameYard Force Compact 400Ri (2021 model)
Gradient:± 30 % (14°)
Lawn complexity:Simple
Dimensions44,0 x 38,4 x 20,6 cm
Weight (approx.):7,4 kg
App-controliOS, Android
Voice serviceAmazon Alexa, Google Home
Mowing modeThree rotating blades
Cutting height20 - 55 mm in 3 steps
Cutting width16 cm
Mowing in rain:Rain sensor (adjustable)
Charging time100 Min.
Battery runtime60 Min.
Battery typeLithium-ion (20 V / 2,0 Ah)
Battery guarantee:1 year
Product guarantee:5 years
Boundary optionBoundary wire
Safety:Obstacle detection, lift and tilt sensors, pin code
Special features:• App-control • USB-interface for software-updates • Radar-sensor for obstacle detection

Product questions (0)

Product questions
No questions

Guides & manuals

Customer Review(s)

With their technical sophistication and excellent range of features, robots from myRobotcenter never fail to impress. Our robots are guaranteed to provide you with more free time and a better quality of life. Guarantee is also the key word when it comes the longevity of our products. Thanks to their sophisticated, tried and tested technology, our products have proven to be extremely reliable and free of faults. If a design fault should arise, then you can rely on a guarantee that – with many products – extends far beyond the statutory minimum.


Extension of the guarantee to 5 years

Our products come with a manufacturer's guarantee (generally 2 years). At myRobotcenter you get an even longer guarantee on many products: we extend the guarantee period to 5 years.


Complete security over many years

Our 5-year guarantee on labelled products is both a mark of quality and a very special service for you as our customer. In addition to the respective guarantee, we provide you with all the details about the conditions of our guarantees and which services you can expect from us.


What does the guarantee cover?

The 5-year guarantee covers devices bought from us when accompanied by a receipt or another document that proves the validity of the 5-year guarantee. The 5-year guarantee ends five years after the device was purchased. The guarantee is valid for guarantee claims that occur in Europe.

A guarantee claim is valid when the device purchased by you is damaged or destroyed, as a result of the following causes:

  • construction fault, calculation error, casting defect, material defect and production fault

  • direct effects of electrical energy as a result of a ground fault, short circuit, excessive increase in the current strength, electrical arc-over, formation of electrical arcs, insulation faults, excess voltage and the like

Excluded from the guarantee is damage caused by external influences, such as a bounce flash in the circuit or fire damage. Such externally induced damages can be covered under certain circumstances by your household insurance and may include:

  • measuring, controlling and safety device failures

  • excessive pressure other than explosions

  • implosion and other effects of  insufficient pressure

  • lack of water in steam boiler and other apparatus

  • bursts due to centrifugal force


Within the framework of the extended guarantee, operating errors are covered insofar as they impair the functionality of the product and do not represent a contravention of the operating instructions. For such cases we shall charge an excess of 84 euros including VAT.


What is NOT covered by the guarantee?

  • Wear and tear, and damage to wearing parts and batteries (the battery is only covered by the manufacturer's guarantee)

  • Damage that does not impair the technical function of the device, e.g. scratches and scuffs.

  • Damage or destruction due to intentional or grossly negligent acts or omissions on the part of the purchaser or other users of the device.

  • Damage or destruction caused by improper installation/assembly, by improper repairs/adjustments, by improper, non-intended or unusual use or cleaning of the device – especially when the manufacturer’s instructions are not followed – and by operating errors.


What service do we provide in valid guarantee cases?

  1. When repair is technically and objectively possible and the costs of repair do not exceed the current value of the device (see clause 3), the device shall be repaired professionally and the costs incurred in the repair reimbursed by the guarantee.

  2. Should repair be technically or objectively impossible or uneconomical (total write-off), you shall receive a replacement device of the same kind and quality up to the amount of the current value (see clause 3). The damaged or destroyed device is returned to us and becomes our property.

  3. The current value of your device is 50% of the purchase price in the 3rd year after conclusion of purchase contract, 40% in the 4th year and 30% in the 5th year of the purchase price as stated in the receipt.


Is your device broken?

Just ask us for help. We will support you with the repair request.

  1. In the matters of a needed repair, a skilled and trained team in service and repair department from us or from the manufacturer itself, will gladly be there for you with advice and act to the side.

  2. Please take care of packing the robot carefully to avoid damage.

  3. Enclose a detailed description of the fault as well as the invoice together with the 5-year guarantee certificate.

  4. The robot must be fully postage paid at and sent to the mentioned address.

  5. Transport costs are paid by you and will not be refunded. We recommend that you keep the postage receipt.



Correct as of: May 2020