Smart Rings, Smart Health Ring for Women Men, Heart Rate Monitor Blood Oxygen Sleep Health Tracker, Sports Fitness Tracker, Long Lasting Batteries, with APP iOS and Android (Silver, USA#8)
Generic
Deep Sleep Monitor Ring, Dustproof Health Ring Multi Function for Sleeping (#6)
Generic
Smart Ring Health Tracker Monitor Heart Rate Monitor Sleep monitori Step Counting Long Battery Life Multi Sports Modes (Ceramic White, 8#-Circumference 56.9mm)
Generic
Gard Pro Ultra Mens Smart Watch, Heart Rate Moniitor, IP68 Waterproof Skii SmartWatch,110 Sports Modes Fitness Activity Tracker, Full Touch Screen Bluetooth Smartwatch Fitness Watch (Black)
Generic