IP68 Waterproof R12Color Screen Smart Ring Heart Rate Blood Oxygen Sleep Monitor For Android IOS. Waterproof Level : IP68 5ATM Waterproof. Waterproof Level:5ATM IP68. After 0.6seconds, the blood oxygen test state will be switched and thethree middle bars will rotate.
Item Tag: 8.2mm
Actual size: JP 10.5-10.7 / EU 50.5 / US 5.75. Marked size: JP 11. Due to the wide band design, the fit may feel slightly tighter than a standard ring. Ring width: approx. 8.2 mm (0.32 in). Light signs of use, minor scratches consistent with age and wear.