Remark:
1. On the initial value screen or the set value screen, press and hold the S4 key for 3
seconds to set, after the setting is completed Press the S3 key to save and return
to the initial countdown screen, and then press the S3 key to enter the next mode.
2. The initial value starts counting down at 24:00:00.
3. Set the value and start counting down with the set time.
4. When the countdown reaches 00:00:00, stop the countdown and return to the
initial value or set value. At this time The whole circle flashes at the same time
and emits a 20-second 'BI, BI, BI sound; press any key to stop business.
5. On the pause interface, press the S2 key to stop the countdown and return to the
initial value interface.
6. Even if you exit the countdown setting mode screen, the countdown will continue.
7. If there is no button operation, it will automatically save and return to the three
constant time display after 60 seconds.
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