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Yes. RGB lighting can be set according to different atmosphere demands. You can also switch off the lights if you don't need them.
No, you don't. G5000 gaming speakers have volume memory and light memory, that is, if you turn off the speakers by pressing the shutdown button, the volume and light mode you preferred would not change the next time you turn on the speakers.
Simply turn the switch on the wire to control the volume, and you can do the same for the light effects and sound effects.