--- title: Software-Versions date: 2026-05-21T15:02:00+02:00 author: Hannes Heckel canonical_url: "https://www.fast-lta.de//en/products/silent-cubes/software/software-versions" section: Product Pages --- Silent Cubes # Current software versions Find out what software version is the right one for your Silent Cubes system. If in doubt, contact us before updating. You can contact our product support team every day (weekdays Mon–Fri) between 9 am and 5 pm (CET/CEST). Email: • Telephone: +49 (89) 890 47 - 772 [Software 2.x Use this software version, if you - Use a Head Unit C2 or a Silent Cube Compact - Have a Head Unit C4 and your software shows a version 2.x Consider upgrading to a modern Head Unit (Pro) with software 3.x. While we will continue to provide security fixes for version 2.x, latest features might only be available for software 3.x. **Important:** If your Silent Cubes System is running a version with build number below **2.00.29.8162**, make sure to upgrade as soon as possible to guarantee continuous supprt. [Software Version 2.00.29.8162 ](https://www.fast-lta.de//en/products/silent-cubes/software/silent-cubes-update "Software Version 2.00.29.8162")](https://www.fast-lta.de//en/products/silent-cubes/software/silent-cubes-update "Software Version 2.00.29.8162") [Software 3.x Use this software version, if you - Use a Head Unit or Head Unit Pro (H1000 / H1000 Pro) - Have a Head Unit C4 and your software shows a version 3.x Make sure to update your Silent Cubes system on a regular basis to ensure maximum security and banafit from features and improvements. [Software 3.40 ](https://www.fast-lta.de//en/products/silent-cubes/software/version-3-40 "Software 3.40")](https://www.fast-lta.de//en/products/silent-cubes/software/version-3-40 "Software 3.40")