Hollyland Mars 400S Pro II New Firmware Release Notice - Hollyland

Hollyland Mars 400S Pro II New Firmware Release Notice

By Hollyland | March 23, 2026

We have released the latest firmware (Version: H210_S1.0.1.3) for the Hollyland Mars 400S Pro II. This update mainly reduces transmission power during operation and improves the overall user experience.

To ensure optional performance, we recommend updating your device to the latest firmware at your earliest convenience.

How to Download

Visit the Hollyland website (https://www.hollyland.com/) and navigate to Support → Download → Mars 400S Pro II to obtain the firmware file and update instructions.

Should you have any questions, please feel free to contact our technical support team:

Email: support.eu@hollyland.com

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