Amazfit smartwatches get REM sleep tracking boost - Wareable
Amazfit bip u stopped recording REM sleep, help? : r/amazfit
Amazon.com: Amazfit GTR Mini Smart Watch for Men,14-Day Battery Life, Sports with GPS, 5 Satellite Positioning Systems, Fitness Health Tracker Heart Rate, SPO₂ Monitoring,5 ATM Water Resistance, Black : Electronics
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Update brings REM sleep detection to original Amazfit GTR and GTS, improves GPS - GSMArena.com news
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