Inkbird IHT-2XP Manual page 20

Backlight
Backlight helps you check data conveniently. Without any
operation, the backlight will keep activated for the time of
BLT parameter, then be off automatically . You can press
any button to activate it when it's off. If you unfold the
probe, the backlight will be activated automatically when
the probe detects a temperature change.
Display Switch Over
Press and hold button for 3 seconds to switch to
display data of the built-in probe. The screen will
automatically return to display data of the current
channels in 20 seconds if there is no more manual
switchover.
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