# IRS Life Time Tester user manual

URL: https://irs.systems/en/docs/ltt/documentation/ltt-gui-manual/gettingstarted

- [System Overview](/en/docs/ltt/documentation/ltt-gui-manual/gettingstarted/system-overview)
- [Folder Structure](/en/docs/ltt/documentation/ltt-gui-manual/gettingstarted/folder-structure)
- [Setup Guide](/en/docs/ltt/documentation/ltt-gui-manual/gettingstarted/initial-setup-guide)
- [MesSy Version Setup](/en/docs/ltt/documentation/ltt-gui-manual/configuration/messyconfiguration/changing-messy-version)

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![Main](/docs/assets/ltt/assets/main.png)