GTM-M5-ST | Simracing Button Box
12 freely assignable physical functions
USB connection for PC sim racing
Optional mount for your rig
60-Day Test Drive – How It Works
Try your Button Box at your own setup for up to 60 days. You may unpack it, connect it to your PC and use it under normal conditions before deciding whether it is right for you.
How the 60-Day Test Drive works
The 60-day period starts on the day you receive your order. If you decide not to keep the Button Box, you can return it within this period.
Your statutory right of withdrawal remains unaffected. If you return the product after the statutory withdrawal period, the following voluntary guarantee terms apply.
Your refund
For a return under the voluntary 60-Day Test Drive Guarantee, we refund the product price you actually paid. The original delivery costs and the return shipping costs are not included.
There is no fixed inspection or restocking fee. Normal testing of the Button Box does not result in a flat-rate deduction.
Condition of the returned product
Please return the product complete, including all supplied accessories, and package it securely for transport.
If parts are missing, the product has been damaged beyond normal testing, or cleaning, repair or other reconditioning is required, we may deduct a reasonable amount that reflects the actual loss in value or the actual work and material required. We will explain any deduction after inspecting the return. The total deduction will never exceed the product price you actually paid.
At a glance
- 60 days to unpack, connect and test your Button Box at your own setup
- Refund of the product price paid under the voluntary guarantee
- No fixed 25% inspection or restocking fee
- Any deduction is based only on missing parts, damage or necessary reconditioning
Game Compatibility
✅ Works with all PC-based SimRacing games
✅ SimHub-compatible out of the box
❌ Not compatible with console (PS5 / Xbox)
✅USB plug & play (no driver install required)
Games that have been tested by us for compatibility:
- iRacing
- Rennsport
- Assetto Corsa
- Assetto Corsa Competizione
- Project Cars 1 und 2
- Automobilista 1 und 2
- Rfactor 1 und 2
- Dirt Rally und 2.0 / EA Racing Games
- Forza Horizon Series
- F1-Series
- WRC Series
- Le Mans Ultimate
- ETS2 / ATS2
- BeamNG
Product Details
Controls and specifications
- 12 freely assignable physical functions alongside your own Stream Deck
- Dedicated opening for the selected Stream Deck version (MK1 or MK2)
- Four illuminated round buttons, a covered red switch, two rotary controls and an Engine Start/Stop button
- USB connection for PC sim racing
- Carbon-look finish
- Approx. 189 × 136 × 65 mm; approx. 600 g, according to the existing product specification
What's included?
- No Add-Ons: GT Masters-M5-ST Button Box for the selected Stream Deck version, with USB connection.
- GT Masters-M5-ST with Mount: Box plus rig mount and mounting hardware.
- GT Masters-M5-ST Bundle: Box, rig mount, mounting hardware, sim-racing sticker sheet and the Red Stream Deck icon pack.
Important: A compatible Stream Deck is required for this box to function and is not included in any package. The upper illuminated keys belong to that separate device. Icon tiles in the bundle image illustrate the included digital icon pack.
Shipping & Delivery
Dispatch: In-stock items leave southern Germany within 2 working days after payment is received. The period starts on the next working day; weekends and public holidays at our shipping location do not count.
Transit after dispatch: Germany 1–2, Austria/Switzerland 3–4, UK 5–7 and USA around 7 working days. These are estimates, not guaranteed delivery dates; customs may cause delays.
Shipping costs: Regular parcels: Germany €5.99; EU/UK €13.99; Switzerland CHF 24.99; USA €41; other available destinations €30. Lightweight shipments and sticker promotions may differ. Your exact shipping cost is shown at checkout.
Tracking: Included, except for stickers sent by letter mail. Import duties, taxes and handling fees outside the EU are payable by you.
Pay later with Klarna
Split your purchase into up to 3 interest-free payments with Klarna, where available.
Choose Klarna at checkout and select the payment option available to you.
Availability may depend on your country and Klarna approval.
Try your Button Box at your own setup for up to 60 days. You may unpack it, connect it to your PC and use it under normal conditions before deciding whether it is right for you.
How the 60-Day Test Drive works
The 60-day period starts on the day you receive your order. If you decide not to keep the Button Box, you can return it within this period.
Your statutory right of withdrawal remains unaffected. If you return the product after the statutory withdrawal period, the following voluntary guarantee terms apply.
Your refund
For a return under the voluntary 60-Day Test Drive Guarantee, we refund the product price you actually paid. The original delivery costs and the return shipping costs are not included.
There is no fixed inspection or restocking fee. Normal testing of the Button Box does not result in a flat-rate deduction.
Condition of the returned product
Please return the product complete, including all supplied accessories, and package it securely for transport.
If parts are missing, the product has been damaged beyond normal testing, or cleaning, repair or other reconditioning is required, we may deduct a reasonable amount that reflects the actual loss in value or the actual work and material required. We will explain any deduction after inspecting the return. The total deduction will never exceed the product price you actually paid.
At a glance
- 60 days to unpack, connect and test your Button Box at your own setup
- Refund of the product price paid under the voluntary guarantee
- No fixed 25% inspection or restocking fee
- Any deduction is based only on missing parts, damage or necessary reconditioning
✅ Works with all PC-based SimRacing games
✅ SimHub-compatible out of the box
❌ Not compatible with console (PS5 / Xbox)
✅USB plug & play (no driver install required)
Games that have been tested by us for compatibility:
- iRacing
- Rennsport
- Assetto Corsa
- Assetto Corsa Competizione
- Project Cars 1 und 2
- Automobilista 1 und 2
- Rfactor 1 und 2
- Dirt Rally und 2.0 / EA Racing Games
- Forza Horizon Series
- F1-Series
- WRC Series
- Le Mans Ultimate
- ETS2 / ATS2
- BeamNG
Controls and specifications
- 12 freely assignable physical functions alongside your own Stream Deck
- Dedicated opening for the selected Stream Deck version (MK1 or MK2)
- Four illuminated round buttons, a covered red switch, two rotary controls and an Engine Start/Stop button
- USB connection for PC sim racing
- Carbon-look finish
- Approx. 189 × 136 × 65 mm; approx. 600 g, according to the existing product specification
What's included?
- No Add-Ons: GT Masters-M5-ST Button Box for the selected Stream Deck version, with USB connection.
- GT Masters-M5-ST with Mount: Box plus rig mount and mounting hardware.
- GT Masters-M5-ST Bundle: Box, rig mount, mounting hardware, sim-racing sticker sheet and the Red Stream Deck icon pack.
Important: A compatible Stream Deck is required for this box to function and is not included in any package. The upper illuminated keys belong to that separate device. Icon tiles in the bundle image illustrate the included digital icon pack.
Dispatch: In-stock items leave southern Germany within 2 working days after payment is received. The period starts on the next working day; weekends and public holidays at our shipping location do not count.
Transit after dispatch: Germany 1–2, Austria/Switzerland 3–4, UK 5–7 and USA around 7 working days. These are estimates, not guaranteed delivery dates; customs may cause delays.
Shipping costs: Regular parcels: Germany €5.99; EU/UK €13.99; Switzerland CHF 24.99; USA €41; other available destinations €30. Lightweight shipments and sticker promotions may differ. Your exact shipping cost is shown at checkout.
Tracking: Included, except for stickers sent by letter mail. Import duties, taxes and handling fees outside the EU are payable by you.
Split your purchase into up to 3 interest-free payments with Klarna, where available.
Choose Klarna at checkout and select the payment option available to you.
Availability may depend on your country and Klarna approval.
Test the Box for 60 days on your own setup
Use it in real races, feel the buttons and encoders, and see if it truly fits your rig.
If it isn’t right for you, you can return it within 60 days under our Test Drive guarantee.
How the 60-day Test Drive worksYour Stream Deck. More controls.
Add 12 freely assignable physical functions around your own Stream Deck. Keep important in-game actions within reach even when you change Stream Deck profiles.
A compatible Stream Deck is required and is not included.
A place for your Stream Deck
Choose the version that fits your own Stream Deck. A compatible device is required for this box to function; it is not included.
Covered red switch
A distinct tactile control for an important action you choose in your sim.
Two rotary controls
Turn the rotary controls for settings you adjust while driving.
Engine Start/Stop
Give ignition or another in-game action its own dedicated button.
Physical controls beside your Stream Deck.
Example comparison with a simple button-only box. Features of other products vary. Stream Deck hardware is sold separately.
Controls
Assignable functions
Stream Deck integration
Illuminated controls
Mounting
GT Masters-M5-ST
Buttons, covered switch & rotary controls
12 physical functions
Fits your own MK1 or MK2 Stream Deck
4 illuminated round buttons
Optional rig mount bundle
Basic button-only box
Push buttons
Depends on model
No dedicated slot in this example
No lighting in this example
Depends on model
Your sim racing is in good hands
Hi, I’m Luis, founder of BoxOneRacing.
I’m a sim racer myself.
BoxOneRacing is built from real sim racing experience.
I started developing my own Button Boxes because I couldn’t find products that combined the functions, materials and tactile feel I wanted for my own setup.
Today, we develop, manufacture and assemble our products ourselves in Southern Germany.
That means we stay close to every product we ship and to the people using them.
From sim racers. For sim racers.
Over 5000 SimRacers Drive with BoxOneRacing
Real rigs. Real racers. Real results.
I mean, just look at it!
Love it, they give the perfect realism touch to any simracing setup
I love the LEDs :D
I dont think i coult mount i to my setup, but with the included mount and hardware it was super easy to mount it
Still not sure? Let’s clear that up.
What simracers ask before buying:
What can I assign to the 12 physical functions?
Assign supported controls in your game, such as ignition, pit limiter, lights, brake balance or menu actions. The available choices depend on the sim.
Is a Stream Deck included?
No. A compatible Stream Deck is required for the GT Masters-M5-ST to function, but the device and its upper illuminated keys shown in example photos are not part of any package.
Which version should I choose?
MK1 fits the Stream Deck with a metal cover and permanently attached USB cable. MK2 fits the version with a plastic cover and detachable USB-C cable. Compare your device before ordering.
What is included in each package?
No Add-Ons includes the button box. With Mount adds the rig mount and mounting hardware. The Bundle adds the sim-racing sticker sheet and Red Stream Deck icon pack. The Stream Deck device is sold separately.
What are the Stream Deck icons?
The top package includes the Red icon pack supplied as PNG files. They are digital images for your own Stream Deck setup, not physical buttons or a Stream Deck device.
How do I connect the box?
Install your own compatible Stream Deck in the selected MK1 or MK2 version. Connect the complete setup to your PC, then assign supported functions in your game and configure your Stream Deck separately.
When will my order arrive?
In-stock orders are handed to the carrier within 2 working days after payment is received. Working days are Monday to Friday, excluding public holidays. Transport within Germany usually takes another 1–2 working days. See our shipping page for international estimates and costs.
Customer Reviews
GT Masters-M5-ST | Simracing Button Box
Looks good. Screws would have been better than magnets, as the front comes off, when you operate the big red "ignition" switch as you would do in a car. Also the stand / mount is limited in it's angles, so I needed to built a solution around it. But in general is a fine and highly useable box, I'd recommend. Not perfect, but good though.
Great addition to my setup, great value would have liked more mounting options, but, very happy with my purchase.
Super produit pour le Sim Racing
Tutto come descritto, spedizione veloce e si presenta benissimo, peccato solo per una leggera imperfezione nella parte alta, ma nulla di evidente, consiglio