GlobalTime Electronic Double-sided Display, Руководство пользователя

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5.2.4 NTP Setting
You can view NTP server information.
5.2.5 Countdown Setting(Optional)
GlobalTime clocks support countdown function. Please specify it with GlobalTime if you need this
function.
5.2.6 Energy Saving and Brightness Control
There are two modes to save energy, display dim or off. That happens after you specify a time
period.
Besides, energy saving in specified period, you can control display brightness at 5 levels.