1.[Long Battery Life + Charging Case]Our smart ring comes with 7days long battery life, and it comes with a Charging Box which can charge the ring with 12times. If your charging box and ring both full charged, then you don't need more charging for about 30days, and this will ensure you to handle your body situation always for business traveler or outdoor enthusiast. 2.[IP68 ]The smart ring tracker features IP68 waterproof rating, withstanding depths of up to 50 meters. Whether you're washing your hands, showering, swimming, or hiking in the rain, you don't need to remove the ring, allowing you to monitor your data anytime, anywhere. 3.[Health Monitoring]The smart ring is equipped with a high-precision and high-performance heart rate sensor, which can monitor your heart rate, sleep quality, skin temperature etc., 4.[Multi-Exercise Modes and Fitness Tracker]The Smart Health Ring tracks your activities throughout the day with high precision. For example, the Fitness Ring tracks your steps, distance walked and calories burned. In addition, the Smart Ring features different exercise modes such as walking, running and cycling. The ring tracks and scores your activities to encourage a more active lifestyle! 5.[Confirm Size Before Purchase]Please refer to the size chart in the images to select the appropriate size for you. Note that the Smart Ring is intended for everyday monitoring and is NOT a substitute for professional medical devices. 6.[Free App]Smart ring App is without any subscription fee. The device supports Android 5.1 and iOS 8.0 or above.