In my testing, the affordable RingConn Gen 2 lasted one week on a single charge - while delivering a range of competitive health-tracking features.
"They're so rare, and they're incredibly useful scientifically," said Conor O'Riordan of the Max Planck Institute for Astrophysics.
Discover the Trendlox Visionary II Smart Ring: health monitoring, fitness tracking, and lifestyle features in a stylish, ...
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