The Coolest Gadgets of CES 2018

The tiny sticker then tracks the amount of UV rays you're exposed to, and after it syncs with your iOS or Android device, the app will chart your UV exposure and help you make decisions on when to go inside or put on sunscreen. And since it doesn't have a battery, you don't need to worry about charging ...
Read more: The Coolest Gadgets of CES 2018

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