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When the unit is powered by the built-in battery, the backlight of the display turns off in about half a minute after operation. when connected to the electrical grid, there are 3 levels of permanent illumination: high, middle and low or select the position OFF.
Sorry, there was a problem. Please try again later.You can keep the back light on all the time there are 3 levels of brightness along with the ability to shut the backlight off
Sorry, there was a problem. Please try again later.Yes. If it is connected with the transform in the power grid, you can choose 3 levels of permanent illumination or off.
Sorry, there was a problem. Please try again later.Yes 4 levels of brightness.
Sorry, there was a problem. Please try again later.yes to both questions
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