Press the key to turn the LCD backlight ON and OFF.
Press it for 1 second to pop out a quick setting window to adjust more settings about light, sound, contrast,
laser and Guide Light.
In the window opened as above, press [▲], [▼] (or press [1], [2], [3], [4], [5] corresponding to the items)
to choose the settings for switch. When an item is selected, the function corresponding to the key can be
launched ON/OFF by pressing the corresponding number.
1.7 AUTO POWER OFF
The default Auto Power OFF time is 30 minutes. If no key is pressed for such long time, the total station
will be switched off in order to save power.