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setting mode. The temperature range is 1 to 8 . The range increases one level till the maximum
7 level every time you push S Button, the range decreases one level till the minimum 1 level every time you
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push R Button.
Push I Button --- the lock button will light, and it is now in lock status.
Push I Button again --- the lock button light will turn off, and it is now not in lock status.
Lock and Unlock