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1.What's the noise level of the brush?
About 60dB
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2.Does this electric toothbrush come with a travel case?
Yes, you can take it to travel or business trips.
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3.How many brushes come with?
usmile Y1S toothbrush has 2 brush heads.
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4.What is the waterproof level of this toothbrush?
IPX7 waterproof.
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5.How long does battery life last?
One full charge can last up to 180 days, at a using frequency of 2 minutes/time and 2 times/day.
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6.How long does it take for charging time?
4-6 hours.
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7.How long does it take to change the brush head?
We recommend that you change your brush head every three months.
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8.How many modes does it have?
3 cleaning modes. Clean, White, and Soft.
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9.How will I know if toothbrush needs to be charged?
When the charging indicator flashes in red, please charge the toothbrush as soon as possible.