● S1 Button: Luminous dial, Bluetooth on / off
● S2 Button: Mode, Confirm, Save
● S3 Button: Numerical control, Camera shutter, Timer start / pause
● S4 Button: Settings, Switch, Reset
Button operation guide:
:
● Press the button once
● Press the button and hold for about 3s (long press)
● Press and hold two buttons simultaneously
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