Ayce TRUE BALCK 1.0 Manuel D'utilisation page 138

Low humidity
To silence the alert alarm
When the alert is triggered, the alarm will sound and
the alert icon & current reading on the display will
flash. Press [ ALARM / SNOOZE ], [ ALARM ] or
[ ALERT ] key to stop the alarm sound. If you ignore
the alarm, it will stop after 2 minutes.
Note:
You cannot enter conflicting HI / LO values in the
setting. For example, if the HI temperature alert
value is 40°C, you cannot enter more than 39.9°C
for the LO alert, and so forth.
In auto-cycle mode, if any alert is triggered the
display will switch to the regarding channel. After
stopping the alarm. The display will return to
auto-cycle mode afterwards.
If the alert alarm is automatically off after 2 minutes,
the alert icon will still keep flash until the weather
reading is out of the alert range.
alert on
High temperature
alert on
GB