User manual

1.The usb cable can only be plugged into the left keyboard

left --> master

right --> slave (The usb plug is only used to upgrade the firmware)

2.Flash firmware button

①Connect to the computer with a data cable

②Double click the button (not single click!)

③Computer will appear a disk named "IFKB"

④Copy uf2 file to the disk and wait for the disk to disappear. The firmware upgrade is successful.

*Both hands need to upgrade firmware. The firmware file is the same file.

*The firmware does not distinguish between TRRS version and C2C version, and both can be used.

*The firmware needs to be differentiated according to the version of the knob

The above type uses a firmware with "ecno1" in the name(ifwsofle_xxxxxxxx_econ1.uf2)

The above type uses a firmware with "ecno2" in the name(ifwsofle_xxxxxxxx_econ2.uf2)

3.Pay attention to static electricity

4.Firmware updates log


log:Enhanced RGB stability. If the RGB freezes, you can update it.

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