You can find the firmware in QMK, in the keyboards/splitkb/zima folder. You can then flash the macropad, see Kyria Build Guide: Kyria Firmware for more detailed steps on how to flash.
Zima Build Guide: Firmware
You can find the firmware in QMK, in the keyboards/splitkb/zima folder. You can then flash the macropad, see Kyria Build Guide: Kyria Firmware for more detailed steps on how to flash.