Beyonwiz DP-S1 - Manual (Page 55)

STB & PVR Function
45
1-6. Sleep Timer
You can set the DP-S1 to turn off automatically at a specific time. Press
the SLEEP button to set the timer. The DP-S1 will only turn off after a
recording has finished even if you set it to turn off before the
completion of the current recording(s). To cancel the timer, please press
the SLEEP button successively until you set time as “0 min”.