【Multiple Sizes Available】This smart ring is available in sizes from 7 to 11. Please select the size that fits your finger based on the corresponding size chart. For details, please refer to the size chart image.

【No App Subscription Fee】Our health tracker comes with a free app - SmartHealth, with no subscription fees. You need to scan the QR code on the instruction manual to download the SmartHealth app. Then, turn on the Bluetooth on your phone and connect to "R11M" through the app. Generally, the ring will be in a power-off state upon receipt. You need to charge the ring to turn it on. Note: The ring may not be connectable during charging.

【Wide Compatibility】This fitness ring is compatible with Android 5.1 and above and iOS 8.0 and above.

【All-day Health Monitor】The smart ring can monitor your steps, distance, calories, sleep, heart rate, blood oxygen, blood pressure and other data throughout the day. Note: The above data is for reference only.

【Sleep Health Analysis】24-hour sleep monitoring and analysis throughout the day. It includes deep sleep, light sleep and wakefulness.

【Rechargeable at Any Time】The fitness tracking ring comes with a 300mAh mini charging case, which can provide approximately 15 charges for the fitness tracking ring. With an IP68 waterproof standard, you don't need to remove the ring whether for daily use or diving, making it more convenient and worry-free to wear.

【Accessories List】1* Smart Ring, 1* Portable Charging Case, 1* Charging Cable, 1* User Manual. Please read the manual carefully and operate according to the instructions. If there are any quality issues with individual products, please contact us for after-sales service.