How This "Nail Art" Device Tracks UV Exposure

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© L'Oréal

Introducing UV Sense

L'Oréal has recently announced UV Sense: the first battery-free UV sensor that attaches to your finger. Easily mistaken for nail art, this tiny piece of technology detects UV rays and sends users a mobile alert if they are at risk of getting sunburn. It also connects to a mobile app, making it easy for you to track your UVA and UVB exposure over time.