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description: "Detailed release notes and version history for the IODD 2541 firmware."
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# 📜 IODD 2541 Version History

Below is the legacy version history and modification log for the **IODD 2541** firmware.

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### Version R81_B00 (Release)
**Date:** September 14, 2018
*   **Enhancement**: The device unlock state is now securely retained until a USB reset is explicitly triggered or the device is fully disconnected.