Smart Rings for Men, Fitness Trackers for Women - Sleep Tracking Wearable - Heart Rate - Blood Oxygen - IP68 Waterproof, Compatible with Android & iOS（Black） (9#)

Description

Specification Waterproof rating IP8 Thickness: approx. 3 mm Material: Medical grade stainless steel, epoxy inner ring Weight: approx. 4.4 grams Color: Black, Gold Size: 8#, 9#, 10#, 11# Battery type: Lithium-ion polymer Lithium-ion polymer Battery capacity: approx. 17mAh Smart bracelet charging time: 1 hour Theoretical standby time: 15 days Normal use time: 5-7 days Charging method: magnetic charging Included components: Box *1, manual *1, data cable *1, smart bracelet *1