 
Display
Light sensor
—Press
or
to change the light sensor
mode, and to brighten or darken the display.
Power saver time-out
—Select the time-out period after
which the power saver is activated.
Sleep mode
—Select whether the display is switched off to
save battery power 20 minutes after the power saver is 
activated. When the display is switched off, a LED blinks 
to indicate that the device is powered on.
Light time-out
—Scroll left or right to decrease or
increase the time the lights stay on after your last 
keypress.