Hi, I have been using the glow pad for 4 days now. The first day the device was working, there was a red and blue light, but sometimes there is only a blue light. Is this normal?
你好，我開始使用閃亮墊已經四天了。設備工作第一天，有紅燈和藍燈，但有時只有藍燈。這是正常的嗎？
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