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Under normal circumstances, the first 6 hours after people fall asleep is the fixed deep sleep period of the body. There are some people who sleep late at night and are still in deep sleep in the morning. They thus will not hear the alarm sound, which delays their work and study. The designed alarm clock to be worn on the finger replaces ring tones with vibration and can effectively wake up people in deep sleep. When it is the time, the finger alarm clock first vibrants lightly so that deep sleep transits to light sleep. Then as vibration intensity slowly increases, people in light sleep will be waken up.
China Academy of Art
Zhang Guanchen Zhang Ning Liu Qi Xiao Min