Roborock S6 Pure Manual page 10

7.DND mode
This mode is enabled in the factory and effective
between 22:00-08:00 by default.
Note:
1.After the DND mode is enabled, if the cleaner
automatically return to charging dock due to low
battery capacity, the machine will not continue
cleaning after the battery capacity is sufficient.
2. All passive voice prompts (such as low battery)
will be unavailable and the brightness of the power
light will reduce.
3.The DND mode will be disabled once there is any
active operation (such as removing the dust bin).
After scheduled cleaning is set up, the
machine will perform this action before it is
connected to Wi-Fi（TW、RUS
regardless of whether it is connected to
Wi-Fi ）.