Clusters of infrared photodiodes and green LEDs sit along the inside of the band, aligned to the skin to monitor pulse, temperature, and blood-volume changes. Each window is sealed under a thin polymer layer, balancing optical clarity with biocompatibility while preserving the ring’s continuous, scratch-resistant exterior.
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Pokémon TCG competitor Drew tells Newsbeat: "I don't think I would be anywhere near the man I am now if I hadn't started playing Pokémon."