ToolKitRC M8 Manual page 32

power source (the input must be rechargeable
battery power)
xBus display value: The display mode of xBus when
measuring or outputting, can be set to pulse width
value (1000-2000), or original value (0-2047).
Backlight brightness: The brightness level of the
backlight of the display can be set to 1-10
Contrast: Display contrast of the display, which can
be set to (-10 to 10)
Buzzer: The tone of the buzzer can be set to off.
Energy saving tips: The sound and light are not
disconnected from the power supply during this
time.
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@ ToolkitRC 2018