HPLSZCN Smart Ring Health Tracker, Health Ring
HPLSZCN Smart Ring Health Tracker, Health Ring – Sleep Tracking Wearable – Heart Rate – Fitness Tracker Smart Rings for Men &Women, No App Subscription for iphone & Android (Black, 7) SIZE BEFORE YOU BUY: Step one, take string and wrapit around your finger; After straightening the line, usea ruler to measure and selectaccording to specifications FITS LIKE A DREAM: Your favourite sleep tracker is now wrapped around your finger – literally; smart ring is so comfortable, with space aluminium, you won't even know it's there at around 2.5g, While it gathers insights into the quality of your sleep, accurate...