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A child reads or uses electronic products for a long time and he forgets to relax his eyes, which leads to eyes in a state of fatigue. It is scientific that people should take a rest after studying or entertainment for 45 minutes. When taking off the glasses and pressing the cleaning button at the same time, people clean the glasses and relax their eyes. And they can observe residual amount of cleaning fluid from the side. When people turn on the timer switch, it reminds every 45 minutes. When people close the button, the function of reminding is cancelled.