About this item 

• Smart Ring android sport activity tracker smart ring sleep tracker sleep track sensors monitor your sleep, spO2, track activity, recovery, calories, blood oxygen, sports, body temperature, heart rate, stress and more. 
• Sleep Tracker smart ring android sport activity tracker for viewing all the smart ring sleep monitoring data in the smart ring app, the smart ring stores data when not in connection with the app. 
• Sleep Tracker Smart Ring android sport activity tracker is comfortable, ultra-light, waterproof and durable. The health smart ring has a timeless design and is perfect for any occasion, whether walking, jogging, training or going out. 
• Sleep Tracker Smart Ring android sport activity tracker has a long battery life, the battery life lasts 3 - 5 days on a single 30 minute charge.