This function darkens the screen, which aids the user’s concealment. However, the device stays on.
When the device is on, press and hold the ON/OFF (3) button for less than 3 seconds. The display will turn off, the current time and the "Display off" icon will appear.
Press the ON/OFF (3) button briefly to turn on the display.
When you press and hold the ON/OFF (3) button, the display shows the "Display off" icon with a countdown. Holding the button down for the duration of the countdown will power the device off completely.