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UVband can check sun uv strength through series of color change to remind you to take proper anti-uv action:
When you find the UVband changes color,it's the time to apply sunscreen;
When you apply sunscreen on your body,apply sunscreen on the UVband at the same time.It's the time to re-apply sunscreen on your body once the UVband changes color.
When the UVband changes to the specified color,it's the time to get out of the sun.
China Patented and CE&RoHS Certifed.
Patent UV Sunsense & Sunscreen Monitoring Band