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Heart Rate Monitor Bluetooth Fitness Tracker Smart Ring Health Blood Oxygen Monitor Sleeping Monitor Ring Smart Product Name: bluetooth fitness tracker ring/smart health ring/health tracker ring Material :titanium alloy US CODE : 4 /5/6/7/8/9/10/11/12/13/14/15 Functions :Body temperature detection/sleep quality /Blood oxygen monitor /Blood oxygen monitor /pedometer /Pedometer Battery Capacity :15.5 ~19.5 Mah Chariging time: 1H Usage time :4~ 6 days Standby time :10 ~ 15 days 500pcs for customized
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