Details of FOIRing:
--7 sizes for choice, One piece is only 4-6g
--Multiple functions especially the Professional Sleep Monitoring featuring
(Sleep Monitoring, SpO2 Monitoring, Heart Rate Monitoring, HRV Monitoring)
--IP68 waterproof grade Water-resistant to 50 meters
--Tech Ducable Titanium & PVD Coating
--Wireless charging supporting, 4-7 days Long battery life.
--Free app subscription for Android and IOS phones
Audited Supplier 
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