This is a custom ROM for the Huami AmazFit Smartwatch 2 (A1609) and the (to be announced) international Xiaomi AmazFit STRATOS (A1619).

• https://nicolasagliano.com/lo-sblocco-del-bootloader-e-arrivato/
• https://nicolasagliano.com/stratos-1-0-rom-italiana-per-lamazfit-stratos/
• https://forum.xda-developers.com/smartwatch/amazfit/rom-stratosfied-amazfit-amazfit-2-t3758506

adb shell reboot bootloader
fastboot devices
fastboot getvar all