# FW revisions

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FW is available on <https://github.com/flyduino/kissesc-firmware/releases/>
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There are two versions available of this FW\
voice - plays voice sounds at the start up.\
beep - plays beep sounds at the start up.
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**Please use always the latest stable release** unless u have a serious reasons to use one of the beta/unstable versions. Releases are sorted by date descending.
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## 20180627 - v121a voice

stable release - voice version

### changes

* fix a problem where low voltage (below 5v) caused config to reset
* add support for new KISS 25A (Single + 4-in-1 ESC)

### file

&#x20;[**KISS25A\_121a\_SVOICE.hex**](https://github.com/flyduino/kissesc-firmware/releases/download/121a_voice/KISS25A_121a_SVOICE.hex)

## 20180627 - v121a beep

stable release - beep version

### changes

* fix a problem where low voltage (below 5v) caused config to reset
* add support for new KISS 25A (Single + 4-in-1 ESC)

### file

&#x20;[**KISS25A\_121a\_SBEEP.hex**](https://github.com/flyduino/kissesc-firmware/releases/download/121a_beep/KISS25A_121a_SBEEP.hex)