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Android Central
Android Central
Technology
Jerry Hildenbrand

Tech Talk: How can a smartwatch or smart ring detect your blood oxygen levels?

Tech Talk Michael Hicks Android Central
Samsung Galaxy Watch 8 next to Flip 7 hands-on.

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Welcome to Tech Talk, a weekly column about the things we use and how they work. We try to keep it simple here so everyone can understand how and why the gadget in your hand does what it does.

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