FKGZJF Smart Rings for Women Men, Fitness Ring with Heart Rate, Blood Oxygen, HRV, Stress, Sleep Tracker, Step Tracker, No Subscription Fee, lP68 Waterproof Smart Ring for iPhone & Android (Silver 8#

💎【Size Before You Buy】 Before purchasing the FKGZJF Smart Ring, we recommend following the string method shown in our images to measure the outer circumference of the finger you'll wear the smart ring on. Then compare your measurement with our size chart in the images to find your correct size. Quick Tip: Pull the string a bit tighter when measuring, or choose one size smaller. This helps the smart ring fit more securely and prevents it from slipping off easily.

💎【Intelligent Sleep Tracker】: Your favorite sleep tracker is now wrapped around your finger. this health rings for men women can also automatically monitor your sleep. Monitor your falling asleep, waking up time, sleep quality (deep sleep and light sleep) through graphs. You can view daily, weekly and monthly sleep data in the App, helping you better adjust your habits to improve your sleep quality. Fitness ring is so comfort, you won’t even notice it’s there while it monitors your sleep.

💎【Track Your Health from Your Finger】: This slim smart health ring for women men provides 24-hour blood oxygen, 24-hour heart rate and 24-hour HRV monitoring. You can conveniently view these real-time health indicators from your wrist any time, any where, and You can view daily, weekly and monthly health data in the App. Smart health ring for women provides you a more accurate monitoring information to help you explore a healthier lifestyle.

💎【Activity Tracker & Multiple Sport Modes】: The fitness rings for men women automatically track your steps, calories burned and distance throughout the day. This smart ring has multiple sports modes such as running, cycling, skipping rope, walking, hiking, yoga, dancing, golf and more. Active these sport modes, you will get workout route, sport time, steps, heart rate, speeds, calories burned and distance from the App, to provide you with more effective exercise guidance.

💎【NO Subscription Fees】: After purchasing the fit ring, you can enjoy lifetime free access to the smart health application. Enjoy real-time health tracking around the smart ring without any extra fees. No subscription fees to download the App and use it for lifetime.

💎【Long Battery Life】: The FKGZJF Smart Ring has a battery life of up to 3-5 days on a 2 hrs charge. We offer a free portable charging case with 400 mah battery, it can fully charge the smart ring for about 15 times, which greatly extending the usage time to 60 days. You can also charge the charging case, then you can use it to charge the smart ring 15 times again. Ideal for frequent business travelers and outdoor enthusiasts, ensuring continuous health monitoring no matter where you are.

💎【Easy to Charge and Wide Compatibility】: Simply charge the smart rings for women men with a magnetic USB cable or the charging case. The smart rings for women men are compatible with Android 4.4 / iOS 8.4 or above smart phones. What you get includes: FKGZJF smart ring *1, 400mah charging case*1, magnetic USB charge cable*1, type C charge cable(for charging the charge case)*1 and instruction*1. This ring tracker is a great gift for men and women.

Smart Ring for Men Women - Fitness Ring with Heart Rate, Blood Oxygen, HRV Monitor, IP68 Waterproof, Sleep Tracker, Step Tracker, No App Subscription Fee, Utra Battery Life with 400mah big charge case. it's not a Medical devices and accessories.