Photo 1 of **It is used, it is not known if it is missing parts, therefore it is not known if it works 100%.***Vital Health Smart Ring for Women Black Vital Health Ring Smart Rings for Men with Fitness Tracking, Sleep Monitor, Activity Tracking, App (Size 11).

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Photo 1 of **It is used, it is not known if it is missing parts, therefore it is not known if it works 100%.***Vital Health Smart Ring for Women Black Vital Health Ring Smart Rings for Men with Fitness Tracking, Sleep Monitor, Activity Tracking, App (Size 11).Photo 2 of **It is used, it is not known if it is missing parts, therefore it is not known if it works 100%.***Vital Health Smart Ring for Women Black Vital Health Ring Smart Rings for Men with Fitness Tracking, Sleep Monitor, Activity Tracking, App (Size 11).Photo 3 of **It is used, it is not known if it is missing parts, therefore it is not known if it works 100%.***Vital Health Smart Ring for Women Black Vital Health Ring Smart Rings for Men with Fitness Tracking, Sleep Monitor, Activity Tracking, App (Size 11).