问题描述：
英语翻译
All buttons
ON while any buttons is pressed when Hold is off.
Hold
Press for 3 seconds to toggle Hold on and off.
Hold on
Hold off
Blinks if preset limit is reached.
On for 2 seconds
All buttons
ON while any buttons is pressed when Hold is off.
Hold
Press for 3 seconds to toggle Hold on and off.
Hold on
Hold off
Blinks if preset limit is reached.
On for 2 seconds
问题解答：
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