Not specified (follows V1.18 which added accessory detection switch function to enhanced DMX channel)
steps
what you'll need: USB FAT32 drive
1Download KNOWLED_Firmware_MG1200Bi_V1.19.zip from knowled.com/firmware-knowled_6/
2Extract the .bin file
3Format a USB drive as FAT32
4Copy only the .bin file to the USB root directory
5Insert USB drive into the MG1200Bi's USB port
6Power on the fixture, upgrade starts automatically
7Wait for progress bar to complete
8Verify via Menu > Fixture Info
GotchaV1.18 (2025-04-21) is also available and well-documented; V1.19 changelog is unspecified, verify release notes on the firmware page before deploying to critical fixtures
WarningMG1200Bi and MG1200R are separate firmware trains, do not cross-flash
GotchaYouTube tutorial exists: 'Firmware Upgrade for Godox KNOWLED MG1200Bi' for visual reference