"My Skin Track UV measures both UVA and UVB rays, and provides instant status updates while storing up to 3 months of data. The battery-free sensor is activated by the sun and powered by the user's smartphone using near-field communication."
"My Skin Track UV measures both UVA and UVB rays, and provides instant status updates while storing up to 3 months of data. The battery-free sensor is activated by the sun and powered by the user's smartphone using near-field communication."