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Because of the new coronary pneumonia epidemic, many first-line medical workers do not sleep normally and often suffer from insomnia. This product can guide the frontline workers who are insomnia due to fighting the epidemic to maintain a good sleep state through the optimal sleep breathing frequency set by the program. This product will produce a weak green breathing light that can relieve eye fatigue, allowing users to focus on the light and dark changes of the light, allowing users to empty their minds and slowing their breathing, so as to hypnotize the user to sleep.