Does not work independently, only from the socket. At the same time, it has a battery, which, if you unplug the speaker from the outlet, maintains the clock and settings in it. But in sleep mode, the screen is turned off. The next time you plug it in, your settings (including the radio and alarm clock) will not be messed up and stay the same. In general, I recommend it as a cool column. As an alarm clock, I personally did not fit a little for the above reasons.
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