April 30, 2015 — The solution is to use different wavelengths and pair yellow light, which penetrates deeper, with green light, he says. LeBoeuf’s company’s makes a biosensor, found on the Scosche Rhythm+ fitness tracker, that uses measure at the arm and wrist. The yellow light helps penetrate through tattoos so that accurate readings can be generated “even for folks who are all tatted up,” he says. Read More
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